Patents by Inventor James A. Cella

James A. Cella 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).

  • Bisphenol-A dianhydride-based polyimide matrix resins and method of preparation
    Patent number: 4988544
    Abstract: A method for preparing high molecular weight highly thermal and oxidatively stable aryl polyimide compositions is provided which comprises reacting by application of heat, a mixture of bisphenol-A dianhydride, an aromatic diamine and a monoalkyl or dialkyl ester of a dicarboxylic acid or the corresponding anhydride.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: January 29, 1991
    Assignee: General Electric Company
    Inventors: James A. Cella, Marsha M. Grade
  • Macrocyclic oligomers containing spiro(bis)indane moietes
    Patent number: 4980453
    Abstract: Macrocyclic oligomers, including polycarbonates, polyesters, polyamides, polyimides, polyetherketones and polyethersulfones, are conveniently prepared from various spiro(bis)indane compounds, especially the 6,6'-difunctional 3,3',3'-tetramethylspiro(bis)indanes. The macrocyclic oligomers may be conveniently converted to linear polymers.
    Type: Grant
    Filed: January 20, 1988
    Date of Patent: December 25, 1990
    Assignee: General Electric Company
    Inventors: Daniel J. Brunelle, Thomas L. Guggenheim, James A. Cella, Thomas L. Evans, Luca P. Fontana, Gary R. Faler, James M. Fukuyama, Eugene P. Boden, Jonathan D. Rich, Thomas G. Shannon, Sharon J. McCormick, Philip J. McDermott, Alice M. Colley, Joseph W. Guiles
  • Very high heat thermoplastic polyetherimides containing aromatic structure
    Patent number: 4965337
    Abstract: The present invention relates to a wholly aromatic polyetherimide further containing sulfur containing groups in the backbone of the polyetherimide. The polyetherimide is characterized by extremely high glass transition temperatures, high chemical resistance and thermogravimetric stability.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: October 23, 1990
    Assignee: General Electric Company
    Inventors: Edward N. Peters, Dana Bookbinder, James A. Cella
  • Spiro(bis)indane polyamide and polyimide copolysiloxanes and method of preparation
    Patent number: 4950727
    Abstract: Linear polyamide and polyimide copolysiloxane compositions are prepared by contacting a strongly acidic catalyst, basic catalyst or alkali metal fluoride with a macrocyclic spirobiindane polyamide or polyimide disiloxane, either alone or in combination with a cyclic polysiloxane such as octamethylcyclotetrasiloxane.
    Type: Grant
    Filed: April 15, 1988
    Date of Patent: August 21, 1990
    Assignee: General Electric Company
    Inventors: Thomas L. Guggenheim, James A. Cella, Sharon J. McCormick, Alice M. Colley, Jonathan D. Rich, Philip J. McDermott
  • Method for making thianthrene dianhydride and polyimides obtained therefrom
    Patent number: 4864015
    Abstract: A method is provided for making 9,10-dithiaanthracene-2,3,6,7-tetracarboxylic acid dianhydride. Polyimides having improved oxidative stability also are provided which can be made intercondensing organic diamine and the aforementioned dianhydride or a dianhydride mixture.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: September 5, 1989
    Assignee: General Electric Company
    Inventors: James A. Cella, Deborah A. Haitko
  • Spiro(bis)indane bis-oxyphthalic acids and functional derivatives thereof
    Patent number: 4864034
    Abstract: Spiro(bis)indane bis-oxyphthalic acid bisimides are prepared by the reaction of a nitro- or halo-substituted phthalimide with a salt of a 6,6'-dihydroxy-3,3,3'3'-tetramethylspiro(bis)indane. The bisimides may be converted to the corresponding dianhydrides, which react with diamines to form polyetherimides, or to the free tetracarboxylic acids or their salts, esters or amides.
    Type: Grant
    Filed: January 20, 1988
    Date of Patent: September 5, 1989
    Assignee: General Electric Company
    Inventors: James A. Cella, Gary R. Faler
  • High temperature stable polyetherimides from oxydiphthalic dianhydride and a mixture of m- and p-phenylene diamines and diaminodiphenyl ether
    Patent number: 4855391
    Abstract: Polyetherimides are prepared from at least two diamines selected from the group consisting of o-phenylenediamine, m-phenylenediamine and 4-aminophenyl ether and a dicarboxyphenyl ether anhydride, or the esterification product thereof with a low molecular weight alkanol such as methanol. 3,4-Dicarboxyphenyl ether dianhydride is preferred. Said polyimides are tough, flexible and stable at high temperatures.
    Type: Grant
    Filed: June 3, 1988
    Date of Patent: August 8, 1989
    Assignee: General Electric Company
    Inventors: Donald R. Berdahl, James A. Cella, Gary K. Shank
  • Cyclic imides from spirobiindane diamines and methods of preparation
    Patent number: 4837298
    Abstract: Cyclic imides are prepared by the reaction of a bis(dicarboxyphenyl) sulfide or functional derivative thereof, and optionally a second tetracarboxylic acid or functional derivative thereof such as 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride, with a diamine having a spirobiindane nucleus. The cyclic imides may be converted to linear polyimides by reaction with a basic alkali metal sulfide.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: June 6, 1989
    Assignee: General Electric Company
    Inventors: James A. Cella, Thomas L. Guggenheim
  • Zinc borate as a smoke suppressant
    Patent number: 4833190
    Abstract: Zinc borate is added to high hydrocarbon content silicone containing compositions to reduce smoke emission.
    Type: Grant
    Filed: November 27, 1987
    Date of Patent: May 23, 1989
    Assignee: General Electric Company
    Inventors: James A. Cella, Elbridge A. O'Neil, Jr., David A. Williams
  • Method for making thianthrene dianhydride and polyimides obtained therefrom
    Patent number: 4814466
    Abstract: A method is provided for making 9,10-dithiaanthracene-2,3,6,7-tetracarboxylic acid dianhydride. Polyimides having improved oxidative stability also are provided which can be made intercondensing organic diamine and the aforementioned dianhydride or a dianhydride mixture.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: March 21, 1989
    Assignee: General Electric Company
    Inventors: James A. Cella, Deborah A. Haitko
  • Silicone-polyimides, and method for making
    Patent number: 4808686
    Abstract: Silicone-polyimides having improved flexibility can be obtained, by sequentially intercondensing organic diamine, aminoorgano terminated polydiorganosiloxane and aromatic bisanhydride. A decrease in flexural modulus and an increase in elongation percent is effected while flame retardance remains substantially unchanged.
    Type: Grant
    Filed: June 18, 1987
    Date of Patent: February 28, 1989
    Assignee: General Electric Company
    Inventors: James A. Cella, Patrick E. Gallagher, Gary K. Shank
  • Flame retardant wire coating compositions
    Patent number: 4690997
    Abstract: Flame retardant silicon-polyimides are provided having improved elongation which are useful as wire coating compositions.
    Type: Grant
    Filed: July 31, 1985
    Date of Patent: September 1, 1987
    Assignee: General Electric Company
    Inventors: James A. Cella, Marsha M. Grade, Thomas L. Evans
  • Aryl-diethers
    Patent number: 4600798
    Abstract: Aryl-diethers are provided which are produced by reacting a halogenated xylene compound, preferably 4-chloro-ortho-xylene, and an alkali metal salt of a bisphenol compound, preferably bisphenol-A. These aryl-diethers serve as precursors in a process for producing polyetherimide polymers.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: July 15, 1986
    Assignee: General Electric Company
    Inventor: James A. Cella
  • Method for making aromatic bis(etherimide)s
    Patent number: 4467097
    Abstract: A method is provided for making aromatic bis(etherimide)s by effecting reaction between an aromatic bisphenoxide salt and a nitro-substituted N-alkyl phthalimide in the presence of a non-polar organic solvent and an effective amount of a phase transfer catalyst. There is utilized as the phase transfer catalyst, a mixture of a dipolar aprotic solvent and a polyvalent metal salt such as zinc chloride.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: August 21, 1984
    Assignee: General Electric Company
    Inventors: John W. Verbicky, Jr., James A. Cella, Elbridge A. O'Neil, Jr.
  • Method for making keto acids and dione cyclics obtained therefrom
    Patent number: 4386222
    Abstract: A method is provided for oxidatively cleaving .alpha.,.beta.-unsaturated cyclic ketones, such as isophorone, with an oxidizing agent, for example, ozone, and thereafter recovering the resulting keto acid. In instances where ozone is used, an aqueous hydroperoxide and phase transfer catalyst can be used to recover the keto acid. Dione cyclics, for example, dimedone, can be obtained by direct dehydration of the keto acid.
    Type: Grant
    Filed: December 4, 1981
    Date of Patent: May 31, 1983
    Assignee: General Electric Company
    Inventor: James A. Cella
  • Self-bonding one-component RTV silicone rubber compositions
    Patent number: 4358575
    Abstract: A self-bonding additive for a dimedone functional one-component RTV in which the self-bonding agent is a dialkoxydisilylether functional silane.
    Type: Grant
    Filed: December 16, 1981
    Date of Patent: November 9, 1982
    Assignee: General Electric Company Silicone Products Business Division
    Inventors: Warren R. Lampe, Tyrone D. Mitchell, James A. Cella
  • Method for making keto acids and dione cyclics obtained therefrom
    Patent number: 4340753
    Abstract: A method is provided for oxidatively cleaving .alpha.,.beta.-unsaturated cyclic ketones, such as isophorone, with an oxidizing agent, for example, ozone, and thereafter recovering the resulting keto acid. In instances where ozone is used, an aqueous hydroperoxide and phase transfer catalyst can be used to recover the keto acid. Dione cyclics, for example, dimedone, can be obtained by direct dehydration of the keto acid.
    Type: Grant
    Filed: September 2, 1980
    Date of Patent: July 20, 1982
    Assignee: General Electric Company
    Inventor: James A. Cella
  • Methyl-tris-(4-hydroxycoumarin)silane
    Patent number: 4257957
    Abstract: Silyl ethers of 1,3-dicarbonyl cyclic compounds, such as methyl tris-5,5-dimethyl-cyclohexen-2-one-3-yloxy silane can be made by effecting reaction in the presence of an acid acceptor between an organo halosilane and a 1,3-dicarbonyl cyclic organic compound, for example, 5,5-dimethyl-1,3-cyclohexane dione. The silyl ethers are useful as vulcanizing agents for silanol terminated polydiorganosiloxanes.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: March 24, 1981
    Assignee: General Electric Company
    Inventor: James A. Cella
  • Alkoxysilicon materials and method for making
    Patent number: 4238401
    Abstract: Alkoxysilyl ethers of 1,3-dicarbonyl cyclic compounds, such as methoxy tris-5,5-dimethyl-cyclohexen-2-one-3-yloxy silane can be made by effecting reaction in the presence of an acid acceptor between an alkanol, a halosilane and a 1,3-dicarbonyl cyclic organic compound, for example, 5,5-dimethyl-1,3-cyclohexane dione. The alkoxysilyl ethers are useful as vulcanizing agents for silanol terminated polydiorganosiloxanes.
    Type: Grant
    Filed: July 24, 1978
    Date of Patent: December 9, 1980
    Assignee: General Electric Company
    Inventors: James A. Cella, Tyrone D. Mitchell
  • Macrocyclic oligomers containing spiro(bis)indane moieties
    Patent number: RE34431
    Abstract: Macrocyclic oligomers, including polycarbonates, polyesters, polyamides, polyimides, polyetherketones and polyethersulfones, are conveniently prepared from various spiro(bis)indane compounds, especially the 6,6'-difunctional 3,3',3'-tetramethylspiro(bis)indanes. The macrocyclic oligomers may be conveniently converted to linear polymers.
    Type: Grant
    Filed: May 8, 1992
    Date of Patent: November 2, 1993
    Assignee: General Electric Company
    Inventors: Daniel J. Brunelle, Thomas L. Guggenheim, James A. Cella, Thomas L. Evans, Luca P. Fontana, Gary R. Faler, James M. Fukuyama, Eugene P. Boden, Jonathan D. Rich, Thomas G. Shannon, Sharon J. McCormick, Philip J. McDermott, Alice M. Colley, Joseph W. Guiles