Precious Stone Working Patents (Class 125/30.01)
  • Publication number: 20110146349
    Abstract: The invention relates to a gemstone (10) comprises a girdle (13), a crown (11) and a pavilion (12). The crown has a table (14), ten star facets (15) surrounding the table, ten bezel facets (16) aligned between the star facets and twenty upper girdle facets (20) aligned between the bezel facets. The pavilion is provided with ten pavilion main facets (24), twenty pavilion hook facets (29) aligned between the pavilion main facets and ten pavilion star facets (34) aligned between the pavilion hook facets. The invention also relates to a method of cutting the gemstone.
    Type: Application
    Filed: November 29, 2010
    Publication date: June 23, 2011
    Inventor: Paras Paresh Mehta
  • Publication number: 20110146350
    Abstract: The invention relates to a gemstone (10) comprises a girdle (13), a crown (11) and a pavilion (12). The crown (11) comprises a table (14), eight star facets (15) surrounding the table (14), eight first half facets (16) aligned between the star facets (15), eight second half facets (17) aligned adjacent to the first half facets (16) and sixteen upper girdle facets (20) aligned between the second half facets (17). The pavilion (12) comprises sixteen pavilion main facets (23) and sixteen lower girdle facets (25) aligned between the pavilion main facets (23). The invention also relates to a method of cutting the gemstone.
    Type: Application
    Filed: December 6, 2010
    Publication date: June 23, 2011
    Inventor: Alain Vets
  • Publication number: 20110126815
    Abstract: The present invention protects opals during processing from rhyolite nodules. An opal containing rhyolite nodule is soaked in a heated polyester resin, styrene (100-42-5) solution for 24 hours per 10 grams of nodule. The rhyolite nodule is dried and sawed into slabs, which are soaked in a heated polyester resin, styrene (100-42-5) solution. The soaked slabs are cut into pieces, cabochons are marked out, and the pieces are rough cut into pre forms. The pre forms are soaked in a heated polyester resin, styrene (100-42-5) solution, beneficially for 24 hours. The pre forms are dried and cut into cabochons, which are soaked (preferably for 24 hours) in a heated polyester resin, styrene (100-42-5) solution. The soaked cabochons are then dried, polished, and air cured.
    Type: Application
    Filed: November 30, 2010
    Publication date: June 2, 2011
    Inventor: THOMAS C. SHOPE, JR.
  • Publication number: 20110036339
    Abstract: A system for cutting a plurality of substrates of integrated circuit units comprising a plurality of tables (40, 55), each table including a plurality of trays (37A, 37B, 57A, 57B), each tray arranged to receive one of said substrates; each of said tables selectively movable between a respective loading station (20) for receiving said substrates and a cutting station for cutting the substrates, and a substrate placement device (35) for placing the substrates on the respective trays of said tables; wherein the substrate placement device is arranged to sequentially place substrates on said tables with said tables arranged to sequentially move to the cutting station after receiving the substrates and then return to their respective loading stations for placement of additional substrates.
    Type: Application
    Filed: May 4, 2009
    Publication date: February 17, 2011
    Inventors: Jong Jae Jung, Deok Chun Jang, Chang Hwan Ha, Chong Chen Lim, Seung Ho Baek
  • Publication number: 20100282234
    Abstract: An ornamental diamond is provided as an extremely bright diamond with numerous reflection patterns when viewed from above its table facet and crown facets. The diamond has the same crown as the round brilliant cut and its pavilion consists of a first pavilion and a second pavilion separated by a horizontal division plane. The second pavilion is an octagonal pyramid and its side faces form second pavilion main facets. The first pavilion is a hexadecagonal frustum with a top face on the horizontal division plane and its side faces form first lower girdle facets. First pavilion main facets extend from the girdle and between the first lower girdle facets, into between the second pavilion main facets. The ornamental diamond having the two-stage pavilion is much more brilliant than and has twice as many reflection patterns as the conventional round brilliant cut.
    Type: Application
    Filed: January 9, 2008
    Publication date: November 11, 2010
    Applicant: HOHOEMI BRAINS, INC.
    Inventors: Tamotsu Matsumura, Yoshinori Kawabuchi, Akira Itoh
  • Publication number: 20100154473
    Abstract: The present invention discloses a round brilliant cut diamond. The diamond includes a crown, a girdle, and a pavilion, the cut crown includes one regular octagon table, eight first facets, eight second facets, and sixteen third facets, wherein the cut pavilion has sixteen quadrangular fourth facets, sixteen quadrangular fifth facets, and sixteen sub-triangular sixth facets. The sixteen fourth facets meet at a point, which forms an apex, and each fourth facet, fifth facet and sixth facet meet a point. A depth of the fourth facets is smaller than 21.6% of the total girdle diameter D. The present invention also discloses methods for preparing above mentioned round brilliant-cut diamond.
    Type: Application
    Filed: February 26, 2010
    Publication date: June 24, 2010
    Inventor: Xiben Xheng
  • Publication number: 20100059034
    Abstract: A method of producing gemstones includes obtaining a plate of chemical vapor deposition formed diamond. The plate is cut into a plurality of geometrically optimized preforms. The preforms may be finished and cut into diamond gemstones.
    Type: Application
    Filed: May 8, 2009
    Publication date: March 11, 2010
    Applicant: Apollo Diamond Gemstone Corporation
    Inventors: Robert C. Linares, Patrick J. Doering
  • Publication number: 20100000507
    Abstract: A cut gemstone has one or more backside grooves cut into backside facets to form sub facets that operate to increase the brilliance of the cut gemstone.
    Type: Application
    Filed: May 8, 2009
    Publication date: January 7, 2010
    Applicant: Apollo Diamond Gemstone Corporation
    Inventors: Robert C. Linares, Patrick J. Doering
  • Publication number: 20090320820
    Abstract: A gemstone drill is of the drill press type which includes a motor suspended and slidably affixed between upstanding vertical telescoping rods. A drill bit is affixed to a spindle which is a direct extension of the motor shaft which is in parallel alignment with the rods. A body of the motor includes a cylindrical spindle housing extending downwardly from the bottom of the motor body adjacent the drill bit. The rods are extensible from tower sleeves mounted directly to a base which has a top support surface enclosed by a transparent containment cover. The door is moveable between open and closed positions to gain access to a clamping mechanism releasably attached to the support surface that holds the stone to be drilled. The containment cover, when closed, includes a circular aperture at the top which closely receives the spindle housing.
    Type: Application
    Filed: June 25, 2008
    Publication date: December 31, 2009
    Inventor: John J. Sinisi
  • Patent number: 7510462
    Abstract: In one embodiment, a cutting tool assembly used for creating grooves in a microreplication tool is described. The cutting tool assembly includes a mounting structure and multiple diamonds mounted in the mounting structure. For example, first and second tool shanks having first and second diamond tips can be positioned in the mounting structure such that a cutting location of a diamond cutting tip of the first tool shank is a defined distance from a cutting location of a diamond cutting tip of the second tool shank. The defined distance may correspond to an integer number of pitch spacings, and may be accurate to within a tolerance of less than approximately 10 microns.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: March 31, 2009
    Assignee: 3M Innovative Properties Company
    Inventors: William J. Bryan, Nelson D. Sewall, Jeffrey E. Clements, Greg E. Schrank, Jennifer L. Trice, Timothy L. Hoopman, Charles N. DeVore
  • Publication number: 20090038341
    Abstract: The present invention discloses a round brilliant cut diamond. The diamond includes a crown, a girdle, and a pavilion, the cut crown includes one regular octagon table, eight first facets, eight second facets, and sixteen third facets, wherein the cut pavilion has sixteen quadrangular fourth facets, sixteen quadrangular fifth facets, and sixteen sub-triangular sixth facets. The sixteen fourth facets meet at a point, which forms an apex, and each fourth facet, fifth facet and sixth facet meet a point. The present invention also discloses methods for preparing above mentioned round brilliant-cut diamond.
    Type: Application
    Filed: September 9, 2004
    Publication date: February 12, 2009
    Inventor: Xiben Zheng
  • Patent number: 7431632
    Abstract: A control system for controlling processing of workpieces such as jewelry has gantry and gimbal units having x, y, z translational and x, y, z rotational degrees of freedom, the units carrying a gripper for holding a piece of jewelry. Drive motors are associated with each translational and rotational degree of freedom and an actuator operates the gripper. A controller is linked to the gantry and gimbal unit motors, the gripper unit actuator, and actuators associated with a series of work stations for carrying out processing operations such as lapping and grinding. The controller controls movement of the gripper unit from a start position to pick up a workpiece and move it along a programmed path between the processing stations, and controls operation of actuators at each processing station to process workpieces according to stored program instructions. A user input device provides optional operator control of the movement and processing for system training purposes.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: October 7, 2008
    Assignee: Control Systems Technologies LLC
    Inventor: Vojislav Kalanovic
  • Publication number: 20080190139
    Abstract: The invention concerns a precious, semi-precious or mineral cut stone, comprising a crown (1) including in its center a planar table (2) surrounded with several facets of the crown (3-5), a pavilion (6) comprising a pointed culet (8) and several pavilion facets (9-12 and 17), and between the crown (1) and the pavilion (6), a girdle (7). The invention is characterized in that said pavilion facets comprise at least one top facet (9-12) extending between said pointed culet (8) and an intermediate location (13-16) between the girdle (7) and the culet (8).
    Type: Application
    Filed: May 19, 2006
    Publication date: August 14, 2008
    Inventors: Takehiko Sato, Misuzu Koganei, Hiroyuki Koganei
  • Patent number: 7323156
    Abstract: The present invention is directed to a method for changing the color of colored natural diamonds. The method includes placing a discolored natural diamond in a pressure-transmitting medium which is consolidated into a pill. Next, the pill is placed into a high pressure/high temperature (HP/HT) press at elevated pressure and elevated temperature for a time sufficient to improve the color of the diamond. The diamond may be exposed at elevated-pressure and elevated-temperature conditions within the graphite-stable region of the carbon-phase diagram—without significant graphitization of the diamond, or above the diamond-graphite equilibrium and within the diamond-stable region of the carbon-phase diagram. Finally, the diamond is recovered from said press. Colorless Type Ia and Type II diamonds may be made by this method.
    Type: Grant
    Filed: December 15, 2003
    Date of Patent: January 29, 2008
    Assignee: Bellataire International, LLC
    Inventors: Suresh Shankarappa Vagarali, Steven William Webb, William Edwin Jackson, William Frank Banholzer, Thomas Richard Anthony, George Rene Kaplan
  • Patent number: 7300333
    Abstract: A control system for controlling processing of workpieces such as jewelry has gantry and gimbal units having x, y, z translational and x, y, z rotational degrees of freedom, the units carrying a gripper for holding a piece of jewelry. Drive motors are associated with each translational and rotational degree of freedom and an actuator operates the gripper. A controller is linked to the gantry and gimbal unit motors, the gripper unit actuator, and actuators associated with a series of work stations for carrying out processing operations such as lapping and grinding. The controller controls movement of the gripper unit from a start position to pick up a workpiece and move it along a programmed path between the processing stations, and controls operation of actuators at each processing station to process workpieces according to stored program instructions. A user input device provides optional operator control of the movement and processing for system training purposes.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: November 27, 2007
    Assignee: Control Systems Technologies, LLC
    Inventor: Vojislav Kalanovic
  • Patent number: 7241200
    Abstract: A control system for controlling processing of workpieces such as jewelry has gantry and gimbal units having x, y, z translational and x, y, z rotational degrees of freedom, the units carrying a gripper for holding a piece of jewelry. Drive motors are associated with each translational and rotational degree of freedom and an actuator operates the gripper. A controller is linked to the gantry and gimbal unit motors, the gripper unit actuator, and actuators associated with a series of work stations for carrying out processing operations such as lapping and grinding. The controller controls movement of the gripper unit from a start position to pick up a workpiece and move it along a programmed path between the processing stations, and controls operation of actuators at each processing station to process workpieces according to stored program instructions. A user input device provides optional operator control of the movement and processing for system training purposes.
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: July 10, 2007
    Assignee: Control Systems Technologies, LLC
    Inventor: Vojislav Kalanovic
  • Patent number: 7228856
    Abstract: Ten of pavilion main facets are formed with reference to the previously formed five of first pavilion main facets in which an initial first main facet is formed in a position centered on a line shifted approximately fifteen degrees from the ridge of the raw diamond on the pavilion side. Ten of pavilion main facets 19 radiate from the curette 18 and twenty of lower girdle facets are formed between the adjacent pavilion main facets on the pavilion side of the diamond 1.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: June 12, 2007
    Assignee: Tokyo Shinzyu Co., Ltd.
    Inventor: Takeshi Aoyagi
  • Patent number: 7192337
    Abstract: To provide a diamond rendering reflective light off a table goldenly brilliant by making a proportion thereof symmetrical at any place viewed from an upper face, a side face or a bottom face, a first reference line, a second reference line crossing the first reference lines at a right angle and third reference lines equally dividing segments defined by an intersection of the first reference line and the second reference line into four equal parts, respectively, are provided. A first arc line intersects these reference lines. An approximately regular hexadecagon shaped table is established by line segments defined between these first intersections of the reference lines with the first arc line. Fourth reference lines dividing sectors defined between the third reference lines into two equal parts and a second arc line concentric with and larger than the first arc line, are provided.
    Type: Grant
    Filed: February 15, 2006
    Date of Patent: March 20, 2007
    Assignee: Diana Sun Diamond Co., Ltd.
    Inventor: Naotake Shuto
  • Patent number: 7032586
    Abstract: An improved single point engraving burin tip, for use in hand engraving and stone setting in the hand engraving and jewelry fields. More specifically, the invention provides a single point engraving tip with a secondary relieving area to the primary cutting edge.
    Type: Grant
    Filed: February 8, 2005
    Date of Patent: April 25, 2006
    Inventor: Steven James Lindsay
  • Patent number: 7004158
    Abstract: A masonry block that is produced from a workpiece that is split in a block splitting assembly which uses engagement surfaces that are enhanced with, for example, alternating ridges and valleys, preferably in combination with workpiece-engaging projections, to supplement or replace the action of the splitting blade in splitting and dressing the workpiece.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: February 28, 2006
    Assignee: Anchor Wall Systems, Inc.
    Inventors: Ronald J. Scherer, David Matthew LaCroix, Glenn C. Bolles
  • Patent number: 7000607
    Abstract: A gemstone having a crown, a girdle and a pavilion, wherein the girdle is shaped such that, when viewed in plan view, it is primarily bounded by four pairs of parallel straight edges. Three of the four pairs of edges are spaced by roughly equal spacing D1, while the remaining pair of edges is spaced by a spacing D2, wherein D2 is greater than D1 by between 10% and 40%. Also provided is a method for cutting such a gemstone.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: February 21, 2006
    Inventor: Ofer Davidi
  • Patent number: 6918715
    Abstract: A masonry block that is produced from a workpiece that is split in a block splitting assembly which uses any of a variety of projections to supplement or replace the action of the splitting blade in splitting and dressing the workpiece. The resulting masonry block has features that provide the masonry block with a weathered appearance.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: July 19, 2005
    Assignee: Anchor Wall Systems, Inc.
    Inventors: Ronald J. Scherer, David Matthew LaCroix, Michael J. Hogan, Glenn C. Bolles
  • Patent number: 6915663
    Abstract: Disclosed is a diamond cutting method comprising the steps of: forming a square or rectangular table in a piece of gemstone; and forming a pavilion continuous to the table by cutting vertically from each side of the square or rectangular table to define the four lower-girdle facets and by cutting obliquely from each corner of the square or rectangular table to the culet of the pavilion to form four lower-main facets, whereby the upper opposite sides of each lower-main facet adjoining the adjacent lower-girdle facets whereas the lower opposite sides of each lower-main facet adjoining the confronting lower opposite sides of the adjacent lower-main facets. An enneahedral-cut diamond thus produced is a table-and-pavilion structure, permitting plural diamonds to be arranged side by side as a whole with their square or rectangular tables directed inward or outward.
    Type: Grant
    Filed: August 12, 2004
    Date of Patent: July 12, 2005
    Inventor: Naotake Shuto
  • Patent number: 6913009
    Abstract: Disclosed is a diamond cutting method comprising the steps of: forming a square or rectangular table in a piece of gemstone; and forming a pavilion continuous to the table by cutting vertically from each side of the square or rectangular table to define the four lower-girdle facets and by cutting obliquely from each corner of the square or rectangular table to the culet of the pavilion to form four lower-main facets, whereby the upper opposite sides of each lower-main facet adjoining the adjacent lower-girdle facets whereas the lower opposite sides of each lower-main facet adjoining the confronting lower opposite sides of the adjacent lower-main facets. An enneahedral-cut diamond thus produced is a table-and-pavilion structure, permitting plural diamonds to be arranged side by side as a whole with their square or rectangular tables directed inward or outward.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: July 5, 2005
    Inventor: Naotake Shuto
  • Patent number: 6892720
    Abstract: A method for producing a diamond includes forming a table lying in a table plane; forming crown facets that are oriented at an angle of between 26° and 35° relative to the table plane; forming upper pavilion (UP) facets below the crown facets at an angle of between 45° and 80° relative to a girdle plane lying between bottoms of the crown facets and tops of the UP facets; and forming a set of lower pavilion (LP) facets between bottoms of the UP facets and the culet at an angle of between 38° and 44° relative to the girdle plane. The UP and LP facets form a rib line positioned between one-fifth and four-fifths the distance between the girdle plane and the culet, such that the UP facets extend between 20% and 80% of the distance between the girdle plane and the culet.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: May 17, 2005
    Inventors: Michael Schachter, Uri Peleg
  • Patent number: 6881128
    Abstract: A method of producing ceramics base plates is disclosed, comprising forming a continuous flaw on at least one surface of a ceramics sintered base plate from end to end using a flawing tool and dividing the ceramics sintered base plate along the flaw by applying an external force. It is preferred that a blade edge portion of the flawing tool is made of a cemented carbide or diamond. By the method of the invention, the ceramics sintered base plate can be easily divided, and ceramics base plates excellent in dimensional accuracy are obtained without lowering the strength thereof.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: April 19, 2005
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Masuhiro Natsuhara, Hirohiko Nakata
  • Patent number: 6874494
    Abstract: A masonry block that is produced from a workpiece that is split in a block splitting assembly which uses engagement surfaces that are enhanced with, for example, alternating ridges and valleys, preferably in combination with workpiece-engaging projections, to supplement or replace the action of the splitting blade in splitting and dressing the workpiece.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: April 5, 2005
    Assignee: Anchor Wall Systems, Inc.
    Inventors: Ronald J. Scherer, David Matthew LaCroix, Glenn C. Bolles
  • Patent number: 6827075
    Abstract: An automated stone burning apparatus, which precisely adjusts the burning operation and improves the throughput. The apparatus consists of a torch assembly that is mounted in proximity to a stone slab lying upon a roller bed. The torch assembly is movable both transversely and laterally (i.e., in orthogonal directions with respect to the stone slab). An electrical control system adjusts the speed and location of the torch during the burn process.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: December 7, 2004
    Inventor: Robert Bellospirito
  • Patent number: 6772748
    Abstract: A method of forming a stone inlay in an abrasion-sensitive substrate, such as wood, by forming a depression in the substrate, mounting stone on a damping material capable of absorbing the abrasive energy applied to the stone in reducing the dimensions of the stone to fit the depression, cutting the inlay to size and inserting it into the substrate. The cut inlay/damping material composite may be sold separately as an article of manufacture.
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: August 10, 2004
    Inventor: Sean Cleary
  • Publication number: 20030181147
    Abstract: A method for producing a diamond includes forming a table lying in a table plane; forming crown facets that are oriented at an angle of between 26° and 35° relative to the table plane; forming upper pavilion (UP) facets below the crown facets at an angle of between 45° and 80° relative to a girdle plane lying between bottoms of the crown facets and tops of the UP facets; and forming a set of lower pavilion (LP) facets between bottoms of the UP facets and the culet at an angle of between 38° and 44° relative to the girdle plane. The UP and LP facets form a rib line positioned between one-fifth and four-fifths the distance between the girdle plane and the culet, such that the UP facets extend between 20% and 80% of the distance between the girdle plane and the culet.
    Type: Application
    Filed: April 15, 2003
    Publication date: September 25, 2003
    Inventors: Michael Schachter, Uri Peleg
  • Patent number: 6591827
    Abstract: A method for preparing a diamond having a six-pointed-star shaped girdle comprising: (1) providing a round diamond; and (2) grooving six equally spaced, equally-sized triangularly-shaped 120° angled grooves in the girdle of the round diamond. Also disclosed is a grooving machine comprising a dop, wherein the dop may be rotated between six equally-spaced stops.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: July 15, 2003
    Inventor: Roy Fuchs
  • Publication number: 20030070670
    Abstract: A method of forming a stone inlay in an abrasion-sensitive substrate, such as wood, by forming a depression in the substrate, mounting stone on a damping material capable of absorbing the abrasive energy applied to the stone in reducing the dimensions of the stone to fit the depression, cutting the inlay to size and inserting it into the substrate. The cut inlay/damping material composite may be sold separately as an article of manufacture.
    Type: Application
    Filed: October 12, 2001
    Publication date: April 17, 2003
    Inventor: Sean Cleary
  • Publication number: 20020195095
    Abstract: A method for preparing a diamond having a six-pointed-star shaped girdle comprising: (1) providing a round diamond; and (2) grooving six equally spaced, equally-sized triangularly-shaped 120° angled grooves in the girdle of the round diamond. Also disclosed is a grooving machine comprising a dop, wherein the dop may be rotated between six equally-spaced stops.
    Type: Application
    Filed: June 25, 2001
    Publication date: December 26, 2002
    Inventor: Roy Fuchs
  • Publication number: 20020162356
    Abstract: A brilliant-cut gemstone having a pavilion, girdle, and crown is disclosed. The pavilion of the gemstone has 56 facets: specifically, 8 lower diamond-shaped facets, 16 middle kite-shaped facets, and 32 upper triangular facets. The girdle and table may be formed of one or more facets. In one preferred embodiment, the total number of crown facets (excluding the table) is 56, making a total of 114 facets (including the table). In another preferred embodiment, the total number of crown facets (excluding the table) is 64, making a total of 122 facets (including the table).
    Type: Application
    Filed: February 25, 2002
    Publication date: November 7, 2002
    Applicant: Samuel Aaron, Inc.
    Inventor: Robert J. Wueste
  • Publication number: 20020153000
    Abstract: The present invention is directed to a surface restoration composition including an organic acid, a metal oxide and a plasticizer. Optionally, dispersants, thickeners and water can be included in the composition. The inventive composition is applied to a stone surface and buffed to dryness to achieve the desired level of gloss.
    Type: Application
    Filed: February 11, 2002
    Publication date: October 24, 2002
    Inventors: Brian T. Holland, Pablo M. Hernandez
  • Publication number: 20020096167
    Abstract: Disclosed is a diamond cutting method comprising the steps of: forming a square or rectangular table in a piece of gemstone; and forming a pavilion continuous to the table by cutting vertically from each side of the square or rectangular table to define the four lower-girdle facets and by cutting obliquely from each corner of the square or rectangular table to the culet of the pavilion to form four lower-main facets, whereby the upper opposite sides of each lower-main facet adjoining the adjacent lower-girdle facets whereas the lower opposite sides of each lower-main facet adjoining the confronting lower opposite sides of the adjacent lower-main facets. An enneahedral-cut diamond thus produced is a table-and-pavilion structure, permitting plural diamonds to be arranged side by side as a whole with their square or rectangular tables directed inward or outward.
    Type: Application
    Filed: January 11, 2002
    Publication date: July 25, 2002
    Inventor: Naotake Shuto
  • Publication number: 20020088450
    Abstract: Disclosed are a new diamond cutting method and a diamond shape or proportion giving an increased brightness and different brilliant colors to the cut jewel. A piece of diamond having a crown or bezel and a pavilion converging up and down from its girdle is prepared; the table of the crown is cut into a regular polygon having straight sides of an integer multiple of three; star facets, upper-main facets and paired upper-girdle facets are formed on the oblique annular surface between the polygonal table and the girdle; and lower-girdle facets and lower-main facets are cut on the pavilion. The height of the diamond piece is approximately 64% of the diameter of the girdle; the height of the crown is approximately 15.7%; the height of the pavilion is approximately 48.3%; and the largest width of the girdle is approximately 1.2 to 1.4%. The angle formed between the ridge of the crown and the ridge of the pavilion is approximately 77 degrees.
    Type: Application
    Filed: March 15, 2002
    Publication date: July 11, 2002
    Inventor: Naotake Shuto
  • Patent number: 6397832
    Abstract: Disclosed are a new diamond cutting method and a diamond shape or proportion giving an increased brightness and different brilliant colors to the cut jewel. A piece of diamond having a crown or bezel and a pavilion converging up and down from its girdle is prepared; the table of the crown is cut into a regular polygon having straight sides of an integer multiple of three; star facets, upper-main facets and paired upper-girdle facets are formed on the oblique annular surface between the polygonal table and the girdle; and lower-girdle facets and lower-main facets are cut on the pavilion. The height of the diamond piece is approximately 64% of the diameter of the girdle; the height of the crown is approximately 15.7%; the height of the pavilion is approximately 48.3%; and the largest width of the girdle is approximately 1.2 to 1.4%. The angle formed between the ridge of the crown and the ridge of the pavilion is approximately 77 degrees.
    Type: Grant
    Filed: November 7, 2000
    Date of Patent: June 4, 2002
    Inventor: Naotake Shuto
  • Patent number: 6321740
    Abstract: The invention is a block splitting machine which uses an assortment of protrusions to supplement or replace the action of the splitting blade in splitting and dressing masonry block.
    Type: Grant
    Filed: June 11, 1999
    Date of Patent: November 27, 2001
    Assignee: Anchor Wall Systems, Inc.
    Inventors: Ronald James Scherer, David M. LaCroix
  • Publication number: 20010031237
    Abstract: The present invention is directed to a method for treating discolored natural diamond, especially Type IIa diamond and Type IaA/B diamond with nitrogen as predominantly B centers, for improving its color. The method includes placing a discolored natural diamond in a pressure transmitting medium which is consolidated into a pill. Next, the pill is placed into a high pressure/high temperature (HP/HT) press at elevated pressure and elevated temperature within the graphite stable range of the carbon phase diagram for a time sufficient to improve the color of said diamond. Finally, the diamond is recovered from said press. Colorless diamond can be made by this method.
    Type: Application
    Filed: September 28, 1998
    Publication date: October 18, 2001
    Inventors: SURESH SHANKARAPPA VAGARALI, STEVEN WILLIAM WEBB, WILLIAM EDWIN JACKSON, WILLIAM FRANK BANHOLZER, THOMAS RICHARD ANTHONY
  • Patent number: 6244262
    Abstract: A method of forming a decorative shape from a concrete block by cutting the block into a predetermined shaped piece, polishing all flat surfaces and then applying a coating of clear material to the surface of said piece.
    Type: Grant
    Filed: December 28, 1999
    Date of Patent: June 12, 2001
    Inventor: Robert A. Keck