Patents by Inventor Steven B. Dawes

Steven B. Dawes 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: 8037717
    Abstract: A method of manufacturing an optical waveguide preform includes providing a first process gas atmosphere to a soot preform contained in a vessel. The first atmosphere is held in the vessel for a first reacting time sufficient to at least partially dope or dry the soot preform. The vessel is then at least partially refilled with a second doping or drying atmosphere. The second doping or drying atmosphere is held in the vessel for a second reacting time sufficient to further dope or dry the soot preform.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: October 18, 2011
    Assignee: Corning Incorporated
    Inventors: Steven B. Dawes, Daniel W. Hawtof, Michael T. Murtagh, John S. Rosettie, Andrew P. Schermerhorn, Merrill F. Sproul, John Stone, III, Pushkar Tandon
  • Patent number: 7671227
    Abstract: An asymmetric bis-silane compound of the formula A3Si—R1—SiB3 where A, B, and R1 are as defined herein, and to methods for making the bis-silane compound and their use to form layers or films of metal oxide particles, and which layers or films adhere to a suitable substrate. The materials and methods can be used, for example, to make photoactive devices.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: March 2, 2010
    Assignee: Corning Incorporated
    Inventors: Steven B. Dawes, James R. Matthews
  • Patent number: 7589040
    Abstract: The present invention provides doped titania-doped silica glass articles having low thermal expansions and low variations in thermal expansion. According to one embodiment of the invention, a titania-doped silica glass article has a titania content of between about 5 wt % and about 9 wt %; a coefficient of thermal expansion of between about ?30 ppb/° C. and about +30 ppb/° C. at a temperature between 15° C. and 30° C.; and a variation in coefficient of thermal expansion of less than about 5 ppb/° C. at a temperature between 15° C. and 30° C.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: September 15, 2009
    Assignee: Corning Incorporated
    Inventors: Steven B. Dawes, Richard M. Fiacco, Kenneth E. Hrdina, Michael H. Wasilewski
  • Publication number: 20090214413
    Abstract: The present invention relates to an ordered mesoporous carbon and method for manufacturing the ordered mesoporous carbon which is made from a surfactant, a carbon precursor, water (possibly mixed with an acid) and a water immiscible oil. In addition, the present invention relates to a method of formulating a composition which is used to manufacture the ordered mesoporous carbon. Moreover, the present invention relates to an activated carbon which is made by partially oxidizing an ordered mesoporous carbon.
    Type: Application
    Filed: April 21, 2009
    Publication date: August 27, 2009
    Inventors: William P. Addiego, Adra S. Baca, Steven B. Dawes, Wageesha Senaratne
  • Publication number: 20080207937
    Abstract: An asymmetric bis-silane compound of the formula A3Si—R1—SiB3 where A, B, and R1 are as defined herein, and to methods for making the bis-silane compound and their use to form layers or films of metal oxide particles, and which layers or films adhere to a suitable substrate. The materials and methods can be used, for example, to make photoactive devices.
    Type: Application
    Filed: November 29, 2007
    Publication date: August 28, 2008
    Inventors: Steven B. Dawes, James R. Matthews
  • Publication number: 20080152577
    Abstract: The present invention relates to an ordered mesoporous carbon and method for manufacturing the ordered mesoporous carbon which is made from a surfactant, a carbon precursor, water (possibly mixed with an acid) and a water immiscible oil. In addition, the present invention relates to a method of formulating a composition which is used to manufacture the ordered mesoporous carbon. Moreover, the present invention relates to an activated carbon which is made by partially oxidizing an ordered mesoporous carbon.
    Type: Application
    Filed: August 31, 2007
    Publication date: June 26, 2008
    Inventors: William P. Addiego, Adra S. Baca, Steven B. Dawes, Wageesha Senaratne
  • Patent number: 7155936
    Abstract: The present invention provides doped titania-doped silica glass articles having low thermal expansions and low variations in thermal expansion. According to one embodiment of the invention, a titania-doped silica glass article has a titania content of between about 5 wt % and about 9 wt %; a coefficient of thermal expansion of between about ?30 ppb/° C. and about +30 ppb/° C. at a temperature between 15° C. and 30° C.; and a variation in coefficient of thermal expansion of less than about 5 ppb/° C. at a temperature between 15° C. and 30° C.
    Type: Grant
    Filed: August 8, 2003
    Date of Patent: January 2, 2007
    Assignee: Corning Incorporated
    Inventors: Steven B. Dawes, Richard M. Fiacco, Kenneth E. Hrdina, Michael H. Wasilewski
  • Patent number: 7097880
    Abstract: A method for impregnating porous monolith supports with catalytically active materials is disclosed. The impregnation is carried out at a temperature which substantially reduces chemisorption rates such that reactions between the monolith substrate and catalytically active materials in the catalyst solution are minimized. The process can be completed in a practical time that allows for unit selectivity of the weight ratio of catalytically active materials in the substrate to the weight ratio of catalytically active materials in the catalyst solution.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: August 29, 2006
    Assignee: Corning Incorporated
    Inventors: Steven B. Dawes, Prantik Mazumder
  • Patent number: 7089766
    Abstract: Methods, apparatus and precursors for producing substantially water-free silica soot, preforms and glass. The methods and apparatus make substantially water-free fused silica preforms or glass by removing water as a reaction product, removing water from the atmosphere, removing water from the transport process, or combinations thereof. In a first embodiment, substantially water-free soot, preforms or glass are achieved by using a hydrogen-free fuel, such as carbon monoxide, in the deposition process. In another embodiment, a soot producing burner has parameters that enable operation on a substantially hydrogen-free fuel. End burners, which minimize water production, are also described. Such water-free methods are useful in depositing fluorine-doped soot because of the low water present and the efficiency in which fluorine is incorporated. In another embodiment, glassy barrier layer methods and apparatus are described for minimizing dopant migration, especially fluorine.
    Type: Grant
    Filed: January 10, 2005
    Date of Patent: August 15, 2006
    Inventors: Gerald E. Burke, Steven B. Dawes, V. Srikant, Pushkar Tandon
  • Patent number: 6843076
    Abstract: A method of making an optical waveguide preform includes forming a preform including a first portion and a second radial portion, wherein the second portion includes a dopant, and wherein the first portion exhibits a density greater than the second portion. The method further includes stripping at least a portion of the dopant from the second portion. In a preferred embodiment, the stripped dopant has migrated in a previous processing step.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: January 18, 2005
    Assignee: Corning Incorporated
    Inventors: Steven B. Dawes, Michael T. Murtagh, Pushkar Tandon
  • Patent number: 6813907
    Abstract: The invention includes a method of incorporating fluorine into a preform that may be used to produce an optical article. A method that may be used to practice the invention includes a method of making an optical fiber preform. The method includes reacting a fluorine containing precursor in a flame of a combustion burner without forming a soot, thereby forming a fluorine doping atmosphere. A further method that may be practiced to practice the invention includes the step reacting at least a fluorine containing precursor in a flame of a combustion burner, wherein the precursors reacted in the flame are substantially devoid of the element of silicon, thereby forming a fluorine containing atmosphere for the doping of a soot preform.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: November 9, 2004
    Assignee: Corning Incorporated
    Inventors: Steven B. Dawes, William W. Johnson, Jason A. LaCoe, Michael T. Murtagh, Pushkar Tandon
  • Patent number: 6744951
    Abstract: A method of coupling optical waveguides comprising the steps of: (i) providing at least one pair of waveguides located such that (a) light radiation propagating through one of the waveguides will be at least partially coupled to a corresponding waveguide and, (b) these waveguides are separated by a gap of about 2 &mgr;m to about 500 &mgr;m long; the waveguides having positive dn/dT; (ii) filling the gap with a photo-polymerizable composition, the composition having dn/dT of −2×10−4/C to −4×10−4/C; (iii) providing simultaneous photo-radiation through said waveguides, wherein the photo-radiation photo-polymerizes the composition, thereby (a) creating a first region bridging between the waveguides, the first region having a first index of refraction, and (b) a second region encapsulating the first region, the second region having a second index of refraction, such that said first index of refraction of the first region is at least 0.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: June 1, 2004
    Assignee: Cornigg Incorporated
    Inventors: Steven B. Dawes, Michael E. DeRosa, Robert J. Hagerty
  • Publication number: 20040089026
    Abstract: The present invention includes a method of growing a doped glass films suitable for optical applications on a substrate comprising the steps of conveying an organometallic compound of the formula (R3SiO)jM(OR′)k to the substrate and reacting the silica forming substance and the organometallic compound to form the optical layer on the substrate, where M is a metal; R is methyl, ethyl or propyl; R′ is methyl, ethyl, n-propyl, n-butyl, isobutyl or s-butyl; j is 1, 2, 3 or 4; and k=4−j. The present invention also includes planar optical devices made by the above method. Additionally, the present invention includes an optical fiber made by the above method.
    Type: Application
    Filed: June 27, 2003
    Publication date: May 13, 2004
    Inventors: Robert A. Bellman, Steven B. Dawes, Lynn B. Simpson, Ljerka Ukrainczyk
  • Patent number: 6697541
    Abstract: A dynamically tunable filter controls the magnitude of couplings between core and cladding modes of a waveguide by surrounding the waveguide with an overcladding having an adjustable refractive index. The coupled modes are attenuated along the core to produce the desired spectral response. The adjustment to the overcladding index is made in a range that is above the refractive index of the underlying cladding to vary amplitudes of attenuated bands of wavelengths without shifting central wavelengths of the bands.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: February 24, 2004
    Assignee: Corning Incorporated
    Inventors: Gang Chen, Steven B. Dawes, Glenn E. Kohnke, Laura A. Weller-Brophy
  • Publication number: 20030230118
    Abstract: The present invention provides a method for drawing microstructured fibers. A preform having a first set of holes and a second set of holes is provided, and the first set of holes is coupled to a first pressure system, while the second set of holes remains substantially uncoupled to the first pressure system. The pressures of the sets of holes may be independently set or controlled to yield a desired hole geometry in the drawn microstructured optical fiber. The present invention also provides preforms suitable for use with the methods of the invention.
    Type: Application
    Filed: June 12, 2002
    Publication date: December 18, 2003
    Inventors: Steven B. Dawes, Michael T. Gallagher, Daniel W. Hawtof, Natesan Venkataraman
  • Publication number: 20030200771
    Abstract: A method of manufacturing a cane suitable for forming an optical fiber, and a method of forming an optical fiber from the cane. A core composition having about 20% to 30% by weight of P2O5 is formed. An inner cladding composition is formed on an outer surface of the core composition and the core composition and the inner cladding composition are consolidated into a preform having a core and an inner cladding while substantially closing a center line hole of the preform. An outer cladding composition is formed on the preform to define a cane. The cane can then be transformed into an optical fiber.
    Type: Application
    Filed: April 30, 2002
    Publication date: October 30, 2003
    Inventors: Gerald E. Burke, Steven B. Dawes, Gary P. Granger, Michael T. Murtagh, Pushkar Tandon, Carlton M. Truesdale, Ji Wang
  • Patent number: 6599957
    Abstract: A UV light-curable composition comprises: (a) a first component, said first component being UV light-polymerizable polymer having a first index of refraction; and (b) a second component, the second component being UV light-polymerizable monomer having a second index of refraction, the second index of refraction being higher than said first index of refraction; wherein the first component polymerizes slower upon exposure to UV radiation than the second component.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: July 29, 2003
    Assignee: Corning Incorporated
    Inventors: Steven B. Dawes, Michael E. DeRosa, Robert J. Hagerty, Jianguo Wang
  • Publication number: 20030101771
    Abstract: The invention includes a method of incorporating fluorine into a preform that may be used to produce an optical article. A method that may be used to practice the invention includes a method of making an optical fiber preform. The method includes reacting a fluorine containing precursor in a flame of a combustion burner without forming a soot, thereby forming a fluorine doping atmosphere. A further method that may be practiced to practice the invention includes the step reacting at least a fluorine containing precursor in a flame of a combustion burner, wherein the precursors reacted in the flame are substantially devoid of the element of silicon, thereby forming a fluorine containing atmosphere for the doping of a soot preform.
    Type: Application
    Filed: November 30, 2001
    Publication date: June 5, 2003
    Inventors: Steven B. Dawes, William W. Johnson, Jason A. LaCoe, Michael T. Murtagh, Pushkar Tandon
  • Publication number: 20030104209
    Abstract: The present invention includes a method of growing a doped glass films suitable for optical applications on a substrate comprising the steps of conveying an organometallic compound of the formula (R3SiO)jM(OR′)k to the substrate and reacting the silica forming substance and the organometallic compound to form the optical layer on the substrate, where M is a metal; R is methyl, ethyl or propyl; R′ is methyl, ethyl, n-propyl, n-butyl, isobutyl or s-butyl; j is 1, 2, 3 or 4; and k=4−j. The present invention also includes planar optical devices made by the above method. Additionally, the present invention includes an optical fiber made by the above method.
    Type: Application
    Filed: November 30, 2001
    Publication date: June 5, 2003
    Inventors: Robert A. Bellman, Steven B. Dawes, Lynn B. Simpson, Ljerka Ukrainczyk
  • Publication number: 20030079502
    Abstract: A method of manufacturing an optical waveguide preform includes providing a first process gas atmosphere to a soot preform contained in a vessel. The first atmosphere is held in the vessel for a first reacting time sufficient to at least partially dope or dry the soot preform. The vessel is then at least partially refilled with a second doping or drying atmosphere. The second doping or drying atmosphere is held in the vessel for a second reacting time sufficient to further dope or dry the soot preform.
    Type: Application
    Filed: October 26, 2001
    Publication date: May 1, 2003
    Inventors: Steven B. Dawes, Daniel W. Hawtof, Michael T. Murtagh, John S. Rosettie, Andrew P. Schermerhorn, Merrill F. Sproul, John Stone, Pushkar Tandon