Patents by Inventor George H. Beall

George H. Beall 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).

  • Publication number: 20030013593
    Abstract: Disclosed is a substantially transparent glass-ceramic ceramic, and a method for making a glass-ceramic, exhibiting an aluminogallate spinel crystal phase and having a glass-ceramic composition that lies within the SiO2—Ga2O3—Al2O3—K2O—Na2O— system and particularly consisting essentially, in weight percent on an oxide basis, of 25-55% SiO2, 9-50% Ga2O3, 7-33% A12O3, 0-20% K20, 0-15% Na2O, 0-6 Li2O and 5-30% K2O+Na2O, the glass ceramic microstructure containing a crystal phase comprising at least 5%, by weight, of aluminogallate spinel crystals. Another aspect disclosed is optical element selected from the group consisting of an optical fiber, a gain or laser medium, and an amplifier component, a saturable absorber, with the element comprising a transparent glass-ceramic of the same composition and containing a crystallinity of at least about 5% by weight of aluminogallate spinel crystals.
    Type: Application
    Filed: May 2, 2002
    Publication date: January 16, 2003
    Inventors: George H. Beall, Linda R. Pinckney, Bryce N. Samson
  • Patent number: 6490394
    Abstract: An athermal optical device and a method for producing the device, such as an athermal optical fiber reflective grating (20), are described. The athermal optical fiber reflective grating device (20) comprises a negative expansion substrate (22), an optical fiber (24) mounted on the substrate (22) surface, and a grating (26) defined in the optical fiber (24). The method for producing the athermal optical fiber reflective grating (20) device comprises providing a negative expansion substrate (22), mounting an optical fiber (24) with at least one reflective grating (26) defined therein onto the substrate (20) upper surface, and affixing the optical fiber (24) to the substrate (22) at at least two spaced-apart locations (30, 32).
    Type: Grant
    Filed: July 14, 1998
    Date of Patent: December 3, 2002
    Assignee: Corning Incorporated
    Inventors: George H. Beall, David L. Weidman
  • Patent number: 6477299
    Abstract: The invention includes environmentally stable athermalized optical fiber gratings and methods of making such stabilized optical waveguide fiber grating. Stable humidity-resistant athermalized fiber Bragg gratings are provided by stabilizing a negative thermal expansion substrate and utilizing a durable frit to attach the fiber Bragg grating to the substrate.
    Type: Grant
    Filed: March 20, 2000
    Date of Patent: November 5, 2002
    Assignee: Corning Incorporated
    Inventors: George H. Beall, Joel P. Carberry, Kenneth Chyung, Joseph E. Pierson, Kamjula P. Reddy, James E. Webb
  • Publication number: 20020159740
    Abstract: A waveguide structure includes a glass body and a waveguide pattern formed in the glass body by irradiating a predetermined track on the glass body with sufficient energy to grow a crystalline phase along the predetermined track.
    Type: Application
    Filed: October 2, 2001
    Publication date: October 31, 2002
    Inventors: George H. Beall, Nicholas F. Borrelli, Linda R. Pinckney
  • Patent number: 6465380
    Abstract: An athermal optical device and a method for producing the device, such as an athermal optical fiber reflective grating, are described. The athermal optical fiber reflective grating device comprises a negative expansion substrate, an optical fiber mounted on the substrate surface, and a grating defined in the optical fiber. The method for producing the athermal optical fiber reflective grating device comprises providing a negative expansion substrate, mounting an optical fiber with at least one reflective grating defined therein onto the substrate upper surface, and affixing the optical fiber to the substrate at at least two spaced apart locations.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: October 15, 2002
    Assignee: Corning Incorporated
    Inventors: George H. Beall, Kenneth Chyung, Joseph E. Pierson
  • Patent number: 6451111
    Abstract: A nucleant seed for epitaxial growth of single-crystal CaF2 includes SrF2. In some embodiments, YF3, LaF3, or rare-earth fluoride is substituted into the SrF2 structure.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: September 17, 2002
    Assignee: Corning Incorporated
    Inventors: George H. Beall, Charles W. Deneka, Gitmoy Kar
  • Publication number: 20020042339
    Abstract: A ceramic article which consists essentially, by weight on the oxide basis, of 10-25% SiO2, 65-85% Al2O3, and 2-12% Li2O and comprises beta-eucryptite as a first phase having a negative component in thermal expansion and a melting point Tm1, and a second phase having a positive component in thermal expansion which is higher than the component in thermal expansion of the first phase and a melting point Tm2, wherein Tm2>Tm1, wherein the first phase is at most 50% by weight of the ceramic, and wherein the ceramic is characterized by microcracking. Tm2 is at least 1800° C. The ceramic article exhibits a near zero coefficient of thermal expansion from room temperature to 800° C., a high refractoriness, and a high resistance to thermal shock properties which make the inventive ceramic extremely desirable in high temperature applications, such as filters for diesel exhaust engines.
    Type: Application
    Filed: October 1, 2001
    Publication date: April 11, 2002
    Inventors: Douglas M. Beall, George H. Beall
  • Patent number: 6362118
    Abstract: The invention includes methods of stabilizing negative thermal expansion glass-ceramic optical waveguide substrates. The invention includes the stabilized negative thermal expansion glass-ceramic optical waveguide substrates. The stabilized substrates have very stable physical characteristics such as dimensional length when exposed to extreme environments. The stabilized substrates are used to athermalize optical waveguide devices such as optical fiber grating. The stabilized substrates are particularly well suited for providing athermalized fiber Bragg grating.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: March 26, 2002
    Assignee: Corning Incorporated
    Inventors: George H. Beall, Joel P. Carberry, Kenneth Chyung, Joseph E. Pierson, Kamjula P. Reddy, James E. Webb
  • Publication number: 20020028739
    Abstract: A composition for a glass-ceramic material that contains a crystallinity of at least about 30% by weight of forsterite components at a liquidus temperature of about 1525° C. or below. The glass-ceramic has a composition, in weight percent on an oxide basis, consisting essentially of about: 40-60% SiO2; 10-25% Al2O3; 18-30% MgO; 3-10% Na2O; 0-10% K2O; >5-15% TiO2. The invention further comprises a method for achieving high crystalline yield at such a low liquidus with increased solubility of high levels of chromium ions. The glass-ceramics can be used in drawing optical fibers and as gain media in amplifier and laser devices for near infrared wavelengths.
    Type: Application
    Filed: August 14, 2001
    Publication date: March 7, 2002
    Inventors: George H. Beall, Joseph E. Pierson, Linda R. Pinckney
  • Publication number: 20020013206
    Abstract: A glass-ceramic which is substantially and desirably totally transparent, and which contains a predominant crystal phase of forsterite. The glass-ceramic is formed from precursor glasses having the following compositions, in weight percent on an oxide basis: SiO2 30-60; Al2O3 10-25; MgO 13-30; K2O 8-20; TiO2 0-10; and GeO2 0-25. The glass-ceramic may be doped with up to 1 wt. % chromium oxide to impart optical activity thereto.
    Type: Application
    Filed: August 14, 2001
    Publication date: January 31, 2002
    Inventor: George H. Beall
  • Patent number: 6300262
    Abstract: A glass-ceramic which is substantially and desirably totally transparent, and which contains a predominant crystal phase of forsterite. The glass-ceramic is formed from precursor glasses having the following compositions, in weight percent on an oxide basis: SiO2 30-60; Al2O3 10-25; MgO 13-30; K2O 8-20; TiO2 0-10; and GeO2 0-25. The glass-ceramic may be doped with up to 1 wt. % chromium oxide to impart optical activity thereto.
    Type: Grant
    Filed: October 11, 2000
    Date of Patent: October 9, 2001
    Assignee: Corning Incorporated
    Inventor: George H. Beall
  • Patent number: 6297179
    Abstract: A gain medium for use in optical amplifiers or laser oscillators is disclosed. The gain medium includes a transition-metal doped glass-ceramic material having a crystal phase and a glass phase. The crystal phase is formed in situ in the glass phase, with the transition metal ions preferentially partitioning into the crystals from the glass phase. The crystals so formed have a size of less than 50 nm, and the transition metal ions within them are capable of lasing at a wavelength within the range of about 900 to 3000 nm. Also disclosed are amplifier and laser oscillator configurations, where the glass-ceramic gain medium is applied in a variety of configurations. Also disclosed is a method of amplifying a signal of light wherein the glass-ceramic gain medium is pumped with light energy so as to excite the transition metal ions, and the signal of light is transmitted through the gain medium while the transition metal ions are excited, whereby the signal of light is amplified.
    Type: Grant
    Filed: October 11, 2000
    Date of Patent: October 2, 2001
    Assignee: Corning Incorporated
    Inventors: George H. Beall, Nicholas F. Borrelli, Eric J. Mozdy, Linda R. Pinckney
  • Patent number: 6268303
    Abstract: The present invention relates to a glass matrix which includes 4-70 wt. % SiO2, 0.5-20 wt. % Al2O3, 0-20 wt. % R2O, 0-30 wt. % R′O, 8-85 wt. % Ta2O5, 0-40 wt. % Nb2O5, and 0.01-1.0 wt. % R″2O3, where R2O+R″O is between about 2-35 wt. %, Ta2O5+Nb2O5 is between about 8-85 wt. %, R is selected from a group consisting of Li, Na, K, and combinations thereof, R′ is selected from a group consisting of Ba, Sr, Ca, Mg, Zn, Pb, and combinations thereof, and R″ is a rare earth element. The present invention also relates to use of the glass matrix in forming optic waveguides such as optic amplifiers. The present invention further relates to a transparent glass ceramic that contains pyrochlore, perovskite, or a combination thereof as its major crystal phase, and includes 4-40 wt. % SiO2, 1-15 wt. % Al2O3, 0-20 wt. % K2O, 0-12 wt. % Na2O, 0-5 wt. % Li2O, 8-85 wt. % Ta2O5, and 0-45 wt. % Nb2O5, wherein Ta2O5+Nb2O5 is at least about 20 wt.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: July 31, 2001
    Assignee: Corning Incorporated
    Inventors: Bruce G. Aitken, George H. Beall, Nicholas F. Borrelli, Matthew J. Dejneka
  • Patent number: 6214471
    Abstract: A family of aluminoborate glasses that are compatible with aluminum at elevated temperatures, and an article comprising such a glass with either an aluminum coating, or with aluminum particles dispersed within the glass, whereby the glass may be rendered polarizing. The base glass consists essentially of, 15-85% B2O3, 5-45% Al2O3 and 10-75% Li2O+RO, where RO represents the alkaline earth metal oxides MgO, CaO, SrO and BaO, and is free of oxides reacting with aluminum at elevated temperatures.
    Type: Grant
    Filed: November 3, 1999
    Date of Patent: April 10, 2001
    Assignee: Corning Incorporated
    Inventors: Douglas M. Beall, George H. Beall
  • Patent number: 6209352
    Abstract: An athernal optical device and a method for producing the device, such as an athermal optical fiber reflective grating, are described. The athermal optical fiber reflective grating device comprises a negative expansion substrate, an optical fiber mounted on the substrate surface, and a grating defined in the optical fiber. The method for producing the athermal optical fiber reflective grating device comprises providing a negative expansion substrate, mounting an optical fiber with at least one reflective grating defined therein onto the substrate upper surface, and affixing the optical fiber to the substrate at at least two spaced apart locations.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: April 3, 2001
    Assignee: Corning Incorporated
    Inventors: George H. Beall, Kenneth Chyung, Joseph E. Pierson
  • Patent number: 6130178
    Abstract: The present invention is directed at a glass-ceramic having high strength and toughness and containing miserite as a predominant crystal phase. The glass-ceramic has a composition calculated in terms of a weight percent on the oxide basis comprising 40-68% SiO.sub.2, 12-35% CaO, 8-20% CaF.sub.2, 4-10.5% K.sub.2 O, 0-5% Al.sub.2 O.sub.3, 0-5% B.sub.2 O.sub.3, 0-15% P.sub.2 O.sub.5, 0-4% R.sub.2 O.sub.3, wherein R represents Y.sup.3+ and rare earth metals in the lanthanide series, and 0-5% of optional constituents selected from the group consisting of MgO, SrO, BaO, Na.sub.2 O, Nb.sub.2 O.sub.5, ZrO.sub.2, and ZnO, and 0-10% of optional constituents selected from the group consisting of Nb.sub.2 O.sub.5 and TiO.sub.2 and 0-2% Li.sub.2 O as an optional constituent. The glass-ceramic may contain secondary phases of cristobalite (SiO.sub.2), fluorite (CaF.sub.2), xonotlite (Ca.sub.6 Si.sub.6 O.sub.17 F.sub.2), and fluorapatite (Ca.sub.5 (PO.sub.4).sub.
    Type: Grant
    Filed: April 5, 1999
    Date of Patent: October 10, 2000
    Assignee: Corning Incorporated
    Inventors: Ronald L. Andrus, George H. Beall, Linda R. Pinckney, Christine C. Wolcott
  • Patent number: 6124223
    Abstract: Nanocrystalline glass-ceramic materials based on .beta.-quartz solid solution Mg-rich phases formed in the system SiO.sub.2 --Al.sub.2 O.sub.3 --MgO--Li.sub.2 O--TiO.sub.2 (ZnO, BaO, ZrO.sub.2, P.sub.2 O.sub.5). Articles made from the glass-ceramic materials exhibit a crystal phase assemblage of a fine-grained, microstructure which is predominantly .beta.-quartz, and at least one additional phase selected from enstatite and spinel, and having a composition which consists essentially of, in weight percent on the oxide basis, 40-65% SiO.sub.2, 10-14% Al.sub.2 O.sub.3, 5-25% MgO, 0.5-4% Li.sub.2 O, 5-15% TiO.sub.2, and up to 5% ZrO.sub.2, such that the sum of (TiO.sub.2 +ZrO.sub.2) is at least 9% The glass-ceramide article is particularly useful for memory disk applications.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: September 26, 2000
    Assignee: Corning Incorporated
    Inventors: George H. Beall, Linda R. Pinckney
  • Patent number: 6087280
    Abstract: An athermal optical device and a method for producing the device, such as an athermal optical fiber reflective grating, are described. The athermal optical fiber reflective grating device comprises a negative expansion substrate, an optical fiber mounted on the substrate surface, and a grating defined in the optical fiber. The method for producing the athermal optical fiber reflective grating device comprises providing a negative expansion substrate, mounting an optical fiber with at least one reflective grating defined therein onto the substrate upper surface, and affixing the optical fiber to the substrate at at least two spaced apart locations.
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: July 11, 2000
    Assignee: Corning Incorporated
    Inventors: George H. Beall, Kenneth Chyung, Joseph E. Pierson
  • Patent number: 5910459
    Abstract: The glass-ceramic material of the present invention has the hexagonal sheet structure of hexacelsian as its primary crystal phase and exhibits x-ray diffraction patterns indicative of hexacelsian, said glass-ceramic material has a stabilized thermal expansion and an overall weight percent composition comprising: 35-55% SiO.sub.2, 5-25% Al.sub.2 O.sub.3, 5-25% MgO, 5-35% BaO, 6-14% TiO.sub.2, 0-10% ZnO, and 0-8% ZrO.sub.2.
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: June 8, 1999
    Assignee: Corning Incorporated
    Inventors: George H. Beall, Hans J. Holland, Jeffrey T. Kohli
  • Patent number: 5744208
    Abstract: This invention is directed at the makings of glass-ceramic which is uniquely suited for use as a disc substrate for utilization in a magnetic memory storage device. The glass ceramic material exhibits a crystal phase assemblage comprised predominately of a mixture of lithium disilicate and tridymite which are uniformly interspersed with a residual glass phase and form an interlocked microstructure with the glass. The composition consists essentially, expressed in terms of weight percent on the oxide basis, of 75-95% SiO.sub.2, 3-15% Li.sub.2 O, 0-6% Al.sub.2 O.sub.3, and 0-6% K.sub.2 O. The nucleating agent for this glass-ceramic is selected from the group consisting of 0-0.1% Pd and 0-5% P.sub.2 O.sub.5 ; however if Pd is absent the P.sub.2 O.sub.5 amount is at least 0.5% and if P.sub.2 O.sub.5 is absent then the Pd amount is at least 0.005%. Additionally, up to 15% of optional ingredients may be added, including, B.sub.2 O.sub.3, Na.sub.2 O, ZnO, MgO, CaO, SrO, ZrO.sub.2, TiO.sub.2, F, Sb.sub.2 O.sub.3, As.
    Type: Grant
    Filed: June 24, 1994
    Date of Patent: April 28, 1998
    Assignee: Corning Incorporated
    Inventors: George H. Beall, Jeffrey T. Kohli