Patents by Inventor Joseph J. Watkins

Joseph J. Watkins 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).

  • Process for the preparation of copoly(arylene sulfide) with aromatic nitro compound catalyst
    Patent number: 4792600
    Abstract: A process for preparing a copoly(arylene sulfide) corresponding to the structure[(--A--S--).sub.1-x (--A--S--S--).sub.x ].sub.nwherein x is in the range of 0.5 to 0.001 by reacting a mixture of a diiodoaromatic compound and elemental sulfur in the presence of a catalytic amount of an aromatic nitro compound.
    Type: Grant
    Filed: November 9, 1987
    Date of Patent: December 20, 1988
    Assignee: Eastman Kodak Company
    Inventors: Mark Rule, David R. Fagerburg, Joseph J. Watkins
  • Copoly(arylene sulfidex-disulfide)
    Patent number: 4786713
    Abstract: A copoly(arylene sulfide) corresponding to the structure[(--A--S--).sub.1-x (--A--S--S--).sub.x ].sub.nwherein x is in the range of 0.5 to 0.001 prepared by reacting a mixture of a diiodoaromatic compound and elemental sulfur.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: November 22, 1988
    Assignee: Eastman Kodak Company
    Inventors: Mark Rule, David R. Fagerburg, Joseph J. Watkins, Jerry S. Fauver
  • Aromatic polyesters derived from 2,3-butanediol
    Patent number: 4600768
    Abstract: Disclosed are polyesters derived from one or more aromatic dicarboxylic acids and a diol which includes at least 50 mol percent of 2,3-butanediol. The polyesters, prepared by the use of a tin catalyst, are high molecular weight polymers having an inherent viscosity of at least 0.4.
    Type: Grant
    Filed: October 18, 1985
    Date of Patent: July 15, 1986
    Assignee: Eastman Kodak Company
    Inventors: Winston J. Jackson, Jr., Joseph J. Watkins
  • High molecular weight polyesters
    Patent number: 4578453
    Abstract: A high molecular weight polyester suitable for use in forming shaped articles, the polyester having an inherent viscosity of greater than 0.4 and containing repeating units from a glycol component consisting essentially of 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol or mixtures thereof, and an acid component comprising at least 50 mole % of an alicyclic or aromatic dicarboxylic anhydride or corresponding acid having 6 to 30 carbon atoms.
    Type: Grant
    Filed: November 23, 1984
    Date of Patent: March 25, 1986
    Assignee: Eastman Kodak Company
    Inventors: Winston J. Jackson, Jr., Joseph J. Watkins
  • Process for preparation of polyesters with improved molecular weight from glycols containing a vicinal secondary hydroxyl group
    Patent number: 4554344
    Abstract: Disclosed is a process for the preparation of polyesters from aromatic dicarboxylic acids or derivatives thereof and diols containing vicinal hydroxyl groups at least one of which is secondary. The use of a tin catalyst results in the formation of polyesters having I.V.'s of at least about 0.4 when the diol has two secondary hydroxyl groups and at least about 0.7 when the diol has only one secondary hydroxyl group.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: November 19, 1985
    Assignee: Eastman Kodak Company
    Inventors: Winston J. Jackson, Jr., Joseph J. Watkins
  • Process for the production of high molecular weight polyester
    Patent number: 4554343
    Abstract: Disclosed is a process for the preparation of high molecular weight polyesters comprising reacting substantially equimolar amounts of an acid component comprising at least one alicyclic or aromatic dicarboxylic anhydride or corresponding dicarboxylic acid with 1,3- or 1,4-cyclohexanedimethanol, at a temperature between about 110.degree. C. and about 180.degree. C. in a solvent, azeotropically removing water from the reaction mixture while condensing solvent vapor and returning it to the reaction mixture, and recovering the polyester after an inherent viscosity of at least 0.4 has been attained.
    Type: Grant
    Filed: November 23, 1984
    Date of Patent: November 19, 1985
    Assignee: Eastman Kodak Company
    Inventors: Winston J. Jackson, Jr., Joseph J. Watkins
  • High molecular weight unsaturated polyesters of cyclohexanedimethanols
    Patent number: 4539390
    Abstract: Disclosed are linear, high molecular weight unsaturated polyesters prepared by reacting essentially equimolar amounts of an acid selected from maleic acid, maleic anhydride or fumaric acid and cyclohexanedimethanol at temperatures of less than about 200.degree. C. until an I.V. of about 0.5 is reacted.
    Type: Grant
    Filed: March 29, 1984
    Date of Patent: September 3, 1985
    Assignee: Eastman Kodak Company
    Inventors: Winston J. Jackson, Jr., Herbert F. Kuhfuss, Joseph J. Watkins