Patents by Inventor Scott A. Arthurs

Scott A. Arthurs has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6000551
    Abstract: A method for rupturing microalgae in an aqueous suspension is disclosed. In one embodiment the aqueous suspension is passed through a constriction into a liquid phase at a pressure sufficient to rupture the cells by circulating the aqueous suspension through a constriction in a pump loop at a pressure and a percent recycle sufficient to rupture the cells. Cells of the alga Dunaliella salina can be ruptured by the method of the invention to promote froth flotation and mechanical filtration of the cells for recovery of mixed carotenoids.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: December 14, 1999
    Assignee: Eastman Chemical Company
    Inventors: Jeffrey Scott Kanel, Scott Arthur Guelcher
  • Patent number: 5951875
    Abstract: A process and system are disclosed for recovering mixed carotenoids from the alga Dunaliella salina. The harvested cells are ruptured, typically by circulating the algal suspension at high pressure through a pump loop. The cells can then be dewatered by absorptive bubble separation techniques, including a froth floatation circuit that has a roughing zone and a concentrating zone. If further concentration is desired, the algal concentrate can be mechanically filtered in a cross flow microfiltration unit in the absence of flocculating agents with substantially no loss of carotenoids in the permeate. Various methods for extracting mixed carotenoids and other components from the algae are disclosed, including dense gas extraction, and extractions with natural and synthetic flavorants, and edible oils.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: September 14, 1999
    Assignee: Eastman Chemical Company
    Inventors: Jeffrey Scott Kanel, Scott Arthur Guelcher
  • Patent number: 5910254
    Abstract: A process for dewatering an aqueous suspension of microalgae is disclosed in which the aqueous suspension of the algae is introduced into a bubble column or a modified bubble column for generating a froth of bubbles and adsorbed algal cells that can be separated from the aqueous suspension. In one advantageous embodiment, the bubble column is a multi-stage loop-flow flotation column that has three loop-flow zones, each of which is defined by a draft tube concentrically mounted in the column to divide each loop-flow zone into a riser and the downcomer. Fine bubbles of gas and brine are in cocurrent upward flow in the riser and in cocurrent downward flow the downcomer. A higher gas holdup is promoted in the riser than in the downcomer, thereby circulating the brine in loop-flow upwardly through the riser and downwardly through the downcomer. Liquid communication between adjacent loop-flow zones is substantially eliminated. A froth enriched in algae is generated that can be separated from the aqueous suspension.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: June 8, 1999
    Assignee: Eastman Chemical Company
    Inventors: Scott Arthur Guelcher, Jeffrey Scott Kanel
  • Patent number: 5884948
    Abstract: A slam-capable rotary latch employs a single rotary jaw that is releasably retained in its latched position by a rotary pawl, with the latch having a pair of spaced housing side plates that sandwich the rotary jaw and the rotary pawl, with the side plates defining aligned first and second U-shaped notches that cooperate with a third U-shaped notch formed in the rotary jaw for concurrently receiving and latchingly retaining within the confines of the first, second and third U-shaped notches a suitably configured strike formation, with housing side plate portions that define a selected one of the first and second U-shaped notches being rigidified and strengthened by the close proximity presence of a flange 1) that is formed integrally with side plate portions that define the selected notch and 2) that extends transversely to bridge between the housing side plates at a location near the first and second U-shaped notches.
    Type: Grant
    Filed: March 17, 1997
    Date of Patent: March 23, 1999
    Assignee: The Eastern Company
    Inventors: Lee S. Weinerman, Scott A. Arthurs, Arthur J. Kuminski
  • Patent number: 5776349
    Abstract: Methods are disclosed for dewatering an aqueous suspension of microalgae, especially Dunaliella salina, with a Jameson cell. The algal cells are ruptured sufficiently to promote froth flotation of the cells from the suspension. The algal suspension is introduced into the top of the Jameson cell downcomer and passed through an orifice plate therein to generate a free liquid jet of the suspension. The jet is plunged downwardly through a gas and the gas is transported with the jet through a gas and liquid interface into the algal suspension. The momentum of the jet is dissipated, which disperses the gas into fine bubbles. The fine bubbles are intimately contacted with the aqueous suspension in cocurrent downward flow in a collection zone to absorb the algal bodies onto the surfaces of the bubbles. A froth of bubble and algal agglomerates is formed and collapsed to obtain a dewatered algal concentrate.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: July 7, 1998
    Assignee: Eastman Chemical Company
    Inventors: Scott Arthur Guelcher, Jeffrey Scott Kanel
  • Patent number: 5718466
    Abstract: A racking resistant door control mechanism for securing a pivoted door employs an elongate lock rod that extends the height of the door and is journaled for pivotal movement by bearing assemblies having steel covers that enclose plastic bearing liners. The lock rod has upper and lower cam-type latch members welded to its opposite ends for engaging keeper members carried by upper and lower parts of a door frame for holding the door closed. The lock rod extends through and is welded to a steel sleeve at a location spaced a short distance upwardly from the lower latch member. If the lock rod is formed from two elongate elements instead of one, the sleeve is welded to both to aid in forming a connection therebetween. Racking resistance is provided by locating the sleeve and the bearing assemblies such that the steel covers of the bearing assemblies are held in engagement with the latch members and with opposite ends of the sleeve.
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: February 17, 1998
    Assignee: The Eastern Company
    Inventors: Lee S. Weinerman, James L. Hollingsworth, Fredrick L. Putzier, Scott A. Arthurs, Robert D. Dinallo
  • Patent number: 5689980
    Abstract: A push button lock for mounting at an opening formed through a door panel near an edge of the door includes a flush mountable exterior housing having a thin mounting flange that encircles central housing portions that are configured to extend into the door panel opening, and a surface mountable interior housing that defines a bolt passage that carries a spring-projected slide bolt having an end formation configured to latchingly engage a suitably configured striker. The interior housing and the mounting flange of the exterior housing overlap and are clamped toward engagement with interior and exterior door panel portions that extend about the opening.
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: November 25, 1997
    Assignee: The Eastern Company
    Inventors: Lee S. Weinerman, Scott A. Arthurs
  • Patent number: 5611224
    Abstract: A slam-capable rotary latch employs a single rotary jaw that is releasably retained in its latched position by a rotary pawl, with the latch having a pair of spaced housing side plates that sandwich the rotary jaw and the rotary pawl, with the side plates defining aligned first and second U-shaped notches that cooperate with a third U-shaped notch formed in the rotary jaw for concurrently receiving and latchingly retaining within the confines of the first, second and third U-shaped notches a suitably configured strike formation, with housing side plate portions that define a selected one of the first and second U-shaped notches being rigidified and strengthened by the close proximity presence of a flange 1) that is formed integrally with side plate portions that define the selected notch and 2) that extends transversely to bridge between the housing side plates at a location near the first and second U-shaped notches.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: March 18, 1997
    Assignee: The Eastern Company
    Inventors: Lee S. Weinerman, Scott A. Arthurs
  • Patent number: 5595076
    Abstract: A versatile operating mechanism for a two-point latch or lock includes a "front" module having a flush-mountable handle and housing assembly that can be connected by simple fasteners to a "rear" module having a mounting bracket that movably supports linkage including an operating arm A pair of latch assemblies are connected to and operated by the mounting-bracket-mounted linkage.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: January 21, 1997
    Assignee: The Eastern Company
    Inventors: Lee S. Weinerman, Scott A. Arthurs
  • Patent number: D382462
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: August 19, 1997
    Assignee: The Eastern Co.
    Inventors: Scott A. Arthurs, Lee S. Weinerman
  • Patent number: D382791
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: August 26, 1997
    Assignee: The Eastern Company
    Inventors: Lee S. Weinerman, Scott A. Arthurs
  • Patent number: D382792
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: August 26, 1997
    Assignee: The Eastern Company
    Inventors: Lee S. Weinerman, Scott A. Arthurs
  • Patent number: D390086
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: February 3, 1998
    Assignee: The Eastern Company
    Inventors: Lee S. Weinerman, Scott A. Arthurs
  • Patent number: D394373
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: May 19, 1998
    Assignee: The Eastern Company
    Inventors: Lee S. Weinerman, Scott A. Arthurs, Arthur J. Kuminski
  • Patent number: H1801
    Abstract: A switching module capable of sending heartbeat messages and identifying other elements within a telecommunications switching platform as operational over one bus or both buses of a redundant-pair control bus. The module also has a reprogrammable, nonvolatile memory associated with it from which it can run its operating system. The module can also transfer the operating system into another memory, allowing the module to make updates to the operating system stored in the nonvolatile memory without interrupting its execution of its run-time operating code.
    Type: Grant
    Filed: February 19, 1998
    Date of Patent: September 7, 1999
    Assignee: DSC/Celcore, Inc.
    Inventors: Mark D. Browning, James M. Davis, Cecil W. Johnson, Jr., Scott Arthur Kooy, H. John Lohn, III, R. Timothy Wallace
  • Patent number: D415406
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: October 19, 1999
    Assignee: The Eastern Company
    Inventors: Lee S. Weinerman, Scott A. Arthurs
  • Patent number: H1814
    Abstract: A telephony-support module capable of responding to heartbeat messages and identifying itself as operational over one bus or both buses of a redundant-pair control bus. The module also has a reprogrammable, nonvolatile memory associated with it from which the module can run its operating system. The module can also transfer the operating system into another memory, allowing it to make updates to the operating system stored in the nonvolatile memory without interrupting its execution of its run-time operating code.
    Type: Grant
    Filed: February 19, 1998
    Date of Patent: November 2, 1999
    Inventors: Mark David Browning, Cecil W. Johnson, Jr., Scott Arthur Kooy, H. John Lohn, III, Shawn Wayne Vines, R. Timothy Wallace
  • Patent number: D419422
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: January 25, 2000
    Assignee: The Eastern Company
    Inventors: Lee S. Weinerman, Scott A. Arthurs
  • Patent number: D421893
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: March 28, 2000
    Assignee: The Eastern Company
    Inventors: Lee S. Weinerman, Scott A. Arthurs
  • Patent number: D424908
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: May 16, 2000
    Assignee: The Eastern Company
    Inventors: Lee S. Weinerman, Scott A. Arthurs