Patents by Inventor Kewal Singh Dhami

Kewal Singh Dhami 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).

  • Wire coated with diallyl esters of dicarboxylic acids
    Patent number: 4078114
    Abstract: Diallyl esters of dicarboxylic acids are provided corresponding to the formula: ##STR1## wherein R is an organic radical containing from 4 to 20 carbon atoms and is selected from the group consisting of alkyl radicals, cycloalkyl radicals, mixed alkyl-cycloalkyl radicals and aralkyl radicals; R' and R" are independently selected from hydrogen, alkyl, cycloalkyl, aralkyl and aryl radicals and mixtures thereof; and the total carbon atoms in R, R' and R" is from 10 to 34. These diallyl esters are crosslinking coreactants for polymeric compositions and expecially high temperature processing fluorocarbon polymers. The crosslinked compositions are particularly useful for insulation coatings.
    Type: Grant
    Filed: May 16, 1977
    Date of Patent: March 7, 1978
    Assignee: International Telephone and Telegraph Corporation
    Inventors: Elihu J. Aronoff, Kewal Singh Dhami
  • Curable compositions diallyl esters of dicarboxylic acids and fluoropolymers
    Patent number: 4051003
    Abstract: Diallyl esters of dicarboxylic acids are provided corresponding to the formula: ##STR1## wherein R is an organic radical containing from 4 to 20 carbon atoms and is selected from the group consisting of alkyl radicals, cycloalkyl radicals, mixed alkyl-cycloalkyl radicals and aralkyl radicals; R' and R" are independently selected from hydrogen, alkyl, cycloalkyl, aralkyl and aryl radicals and mixtures thereof; and the total carbon atoms in R, R' and R" is from 10 to 34. These diallyl esters are crosslinking coreactants for polymeric compositions and especially high temperature processing fluorocarbon polymers. The crosslinked compositions are particularly useful for insulation coatings.
    Type: Grant
    Filed: March 26, 1976
    Date of Patent: September 27, 1977
    Assignee: International Telephone and Telegraph Corporation
    Inventors: Elihu J. Aronoff, Kewal Singh Dhami
  • Polymeric composition containing mercaptoquinazolone antioxidant
    Patent number: 4039508
    Abstract: Polymeric compositions contain as an antioxidant therefor a mercaptoquinazolone of the formula ##STR1## in which R is allyl or methallyl. The antioxidant forms a covalent bond with the polymer upon crosslinking of the latter and thereby antioxidant loss by volatilization or separation is avoided.
    Type: Grant
    Filed: September 22, 1976
    Date of Patent: August 2, 1977
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Kewal Singh Dhami
  • Crosslinking fluorocarbon compositions using polyallylic esters of polycarboxylic acids
    Patent number: 4031167
    Abstract: A crosslinking composition comprising a blend of at least two polyallylic esters of polycarboxylic acids, one of said esters being a diallylic ester of an alkylene, cycloalkylene, mixed alkylene-cycloalkylene or aralkylene dicarboxylic acid, the other of said esters being a polyallylic ester of an aromatic or heteroaromatic polycarboxylic acid or triallyl ester of isocyanuric acid. The crosslinking compositions are particularly useful as crosslinking coreactants for high temperature processing fluorocarbon polymers. The products resulting from the mixing of fluorocarbon polymers and blends of diallyl esters with triallyl or tetraallyl esters are particularly useful as coatings for wire products.
    Type: Grant
    Filed: June 5, 1975
    Date of Patent: June 21, 1977
    Assignee: International Telephone and Telegraph Corporation
    Inventors: Elihu J. Aronoff, Kewal Singh Dhami
  • Wire coated with a fluorocarbon polymer cross-linked with esters of sulfonyl dibenzoic acid
    Patent number: 3995091
    Abstract: Esters of sulfonyl dibenzoic acid of the formula ##SPC1##In which R.sub.1 and R.sub.2 are selected from the group consisting of allyl and methallyl. The compounds are useful as additives to accelerate the crosslinking of polymeric materials.
    Type: Grant
    Filed: February 3, 1976
    Date of Patent: November 30, 1976
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Kewal Singh Dhami
  • Esters of sulfonyl dibenzoic acid
    Patent number: 3985716
    Abstract: Esters of sulfonyl dibenzoic acid of the formula ##SPC1##In which R.sub.1 and R.sub.2 are selected from the group consisting of allyl and methallyl. The compounds are useful as additives to accelerate the crosslinking of polymeric materials.
    Type: Grant
    Filed: November 29, 1974
    Date of Patent: October 12, 1976
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Kewal Singh Dhami
  • Wire coated with fluorocarbon polymers cross-linked with dialyl ester of 4,4'-dicarboxydiphenyl ester
    Patent number: 3970770
    Abstract: The diallyl ester of 4,4'-dicarboxydiphenyl ether acts as an accelerator for the crosslinking of fluorocarbon polymers. The crosslinked polymers are particularly useful as electrical insulation coatings.
    Type: Grant
    Filed: November 29, 1974
    Date of Patent: July 20, 1976
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Kewal Singh Dhami