Patents by Inventor John D. Spivack

John D. Spivack 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: 4552926
    Abstract: The title compounds correspond to the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are alkyl, A is alkylene, X is --NH-- or --S--, m is 1 and n is 0 or 1, and are useful as stabilizers for organic polymers and lubricating oils to counteract the degradative effects of heat, light and air.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: November 12, 1985
    Assignee: Ciba-Geigy Corporation
    Inventors: John D. Spivack, Stephen D. Pastor
  • Patent number: 4547539
    Abstract: Substituted succinic anhydride or succinate stabilizers of the formula I or II ##STR1## where R.sub.1 and R.sub.2 are independently alkyl, cycloalkyl, phenyl or aralkyl, R.sub.3 is hydrogen or methyl, R.sub.4 is hydrogen, lower alkyl or phenyl, R.sub.5 is hydrogen, alkyl, alkylthio, arylthio or the structure ##STR2## and R.sub.6 and R.sub.7 are independently hydrogen, alkyl; aryl or substituted aryl are useful as stabilizers for polymeric substrates, particularly polyolefins and rubber.
    Type: Grant
    Filed: November 1, 1984
    Date of Patent: October 15, 1985
    Assignee: Ciba-Geigy Corporation
    Inventors: John D. Spivack, Stephen D. Pastor
  • Patent number: 4540732
    Abstract: The title compounds correspond to the formula ##STR1## and are useful as stabilizers for organic polymers and lubricating oils to counteract the degradative effects of heat, light and air.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: September 10, 1985
    Assignee: Ciba-Geigy Corporation
    Inventors: John D. Spivack, Stephen D. Pastor, Paul Odorisio
  • Patent number: 4539421
    Abstract: The title compounds correspond to the formula ##STR1## and are useful as stabilizers for organic polymers and lubricating oils to counteract the degradative effects of heat, light and air.
    Type: Grant
    Filed: October 11, 1983
    Date of Patent: September 3, 1985
    Assignee: Ciba-Geigy Corporation
    Inventors: John D. Spivack, Stephen D. Pastor, Paul Odorisio
  • Patent number: 4524166
    Abstract: Primary or secondary amino substituted hindered phosphites of the formula ##STR1## are prepared by reaction of the appropriate phosphorus and phenol compounds, said hindered phosphites being useful as stabilizers of organic polymers and lubricating oils.
    Type: Grant
    Filed: September 14, 1984
    Date of Patent: June 18, 1985
    Assignee: Ciba-Geigy Corporation
    Inventors: John D. Spivack, Stephen D. Pastor
  • Patent number: 4524167
    Abstract: Polymeric hindered secondary phosphonates which have the repeating structural unit of the formula ##STR1## where R.sub.1 and R.sub.2 are independently alkyl, cycloalkyl, aralkyl or alkaryl, A is alkylene, E is alkylene or phenylene, p is 0 or 1 and n is 2 to 50 are useful as stabilizers for organic polymers to counteract the degradative effects of heat, light and air.
    Type: Grant
    Filed: September 27, 1984
    Date of Patent: June 18, 1985
    Assignee: Ciba-Geigy Corporation
    Inventors: John D. Spivack, Stephen D. Pastor
  • Patent number: 4521320
    Abstract: The title compounds correspond to the formula ##STR1## and are useful as stabilizers for organic polymers and lubricating oils to counteract the degradative effects of heat, light and air.
    Type: Grant
    Filed: October 21, 1983
    Date of Patent: June 4, 1985
    Assignee: Ciba Geigy Corporation
    Inventors: John D. Spivack, Stephen D. Pastor
  • Patent number: 4508865
    Abstract: The title compounds correspond to the formula ##STR1## and are useful as stabilizers for organic polymers and lubricating oils to counteract the degradative effects of heat, light and air.
    Type: Grant
    Filed: July 29, 1983
    Date of Patent: April 2, 1985
    Assignee: Ciba-Geigy Corporation
    Inventors: John D. Spivack, Stephen D. Pastor
  • Patent number: 4503243
    Abstract: Hindered silane compounds of the formula ##STR1## are prepared by the reaction of the appropriate silane and phenol compounds, said hindered silanes being useful as stabilizers of organic polymers such as polyolefins, vinyl halide polymers, elastomers, polyesters and polycarbonates.
    Type: Grant
    Filed: January 12, 1983
    Date of Patent: March 5, 1985
    Assignee: Eisai Co., Ltd.
    Inventors: John D. Spivack, Stephen D. Pastor
  • Patent number: 4497959
    Abstract: Substituted succinic anhydride or succinate stabilizers of the formula I or II ##STR1## where R.sub.1 and R.sub.2 are independently alkyl, cycloalkyl, phenyl or aralkyl, R.sub.3 is hydrogen or methyl, R.sub.4 is hydrogen, lower alkyl or phenyl, R.sub.5 is hydrogen, alkyl, alkylthio, arylthio or the structure ##STR2## and R.sub.6 and R.sub.7 are independently hydrogen, alkyl; aryl or substituted aryl are useful as stabilizers for polymeric substrates, particularly polyolefins and rubber.
    Type: Grant
    Filed: February 3, 1983
    Date of Patent: February 5, 1985
    Assignee: Ciba-Geigy Corporation
    Inventors: John D. Spivack, Stephen D. Pastor
  • Patent number: 4474914
    Abstract: Ortho-alkylated phenyl phosphonites of the formula ##STR1## wherein R.sup.1 is alkyl, phenyl or phenyl substituted by alkyl, R.sup.2 is tertiary alkyl or phenylalkyl, and R.sup.3 is hydrogen, alkyl or phenylalkyl are useful as stabilizers for organic polymers and lubricating oils, particularly as processing stabilizers for polyolefins.
    Type: Grant
    Filed: May 31, 1983
    Date of Patent: October 2, 1984
    Assignee: Ciba-Geigy Corporation
    Inventor: John D. Spivack
  • Patent number: 4456716
    Abstract: (4-Hydroxyphenylthio)imide stabilizers of the formula ##STR1## are prepared by the reaction of the appropriate maleimide and mercaptophenol compounds, said imides being useful as stabilizers of organic polymers.
    Type: Grant
    Filed: December 29, 1982
    Date of Patent: June 26, 1984
    Assignee: Ciba-Geigy Corporation
    Inventors: John D. Spivack, Stephen D. Pastor
  • Patent number: 4433087
    Abstract: Alkylated 2,2'-biphenylene phosphonates are prepared by reacting alkylated 2,2'-biphenol with phosphoros trichloride in an organic solvent and then with a base such as sodium hydroxide. Said phosphonates are useful as stabilizers of organic polymers and lubricating oils, especially as stabilizers for polyolefins, polyesters, and polycarbonates.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: February 21, 1984
    Assignee: Ciba-Geigy Corporation
    Inventor: John D. Spivack
  • Patent number: 4406842
    Abstract: Ortho-alkylated phenyl phosphonites of the formula ##STR1## wherein R.sup.1 is alkyl, phenyl or phenyl substituted by alkyl, R.sup.2 is tertiary alkyl or phenylalkyl, and R.sup.3 is hydrogen, alkyl or phenylalkyl are useful as stabilizers for organic polymers and lubricating oils, particularly as processing stabilizers for polyolefins.
    Type: Grant
    Filed: August 31, 1981
    Date of Patent: September 27, 1983
    Assignee: Ciba-Geigy Corporation
    Inventor: John D. Spivack
  • Patent number: 4374219
    Abstract: The title compounds are prepared by reacting alkylated 1,1'-biphenyl-2,2'-diol or alkylated 2,2'-alkylidene-bis-phenol with phosphorus trichloride in an organic solvent and then reacting the intermediate phosphorochlorodite with an alkanolamine. Said phosphites are useful as stabilizers of organic polymers and lubricating oils, especially as processing stabilizers for polyolefins, elastomers, polyesters and polycarbonates.
    Type: Grant
    Filed: July 23, 1981
    Date of Patent: February 15, 1983
    Assignee: Ciba-Geigy Corporation
    Inventors: John D. Spivack, Martin Dexter, Stephen D. Pastor
  • Patent number: 4351759
    Abstract: Alkylated 1,1'-biphenyl-2,2'diyl phosphites are prepared by reacting alkylated 2,2'-biphenol with phosphorus trichloride in an organic solvent and then reacting the intermediate with an alcohol or thiol. Said phosphites are useful as stabilizers of organic polymers and lubricating oils, especially as process stabilizers for polyolefins, elastomers, polyesters and polycarbonates.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: September 28, 1982
    Assignee: Ciba-Geigy Corporation
    Inventor: John D. Spivack
  • Patent number: 4318845
    Abstract: The title compounds are prepared by reacting alkylated 1,1'-biphenyl-2,2'-diol or alkylated 2,2'-alkylidene-bis-phenol with phosphorus trichloride in an organic solvent and then reacting the intermediate phosphorochlorodite with an alkanolamine. Said phosphites are useful as stabilizers of organic polymers and lubricating oils, especially as processing stabilizers for polyolefins, elastomers, polyesters and polycarbonates.
    Type: Grant
    Filed: November 24, 1980
    Date of Patent: March 9, 1982
    Assignee: Ciba-Geigy Corporation
    Inventors: John D. Spivack, Martin Dexter, Stephen D. Pastor
  • Patent number: 4288391
    Abstract: Alkylated 1,1'-biphenyl-2,2'diyl phosphites are prepared by reacting alkylated 2,2'-biphenol with phosphorous trichloride in an organic solvent and then reacting the intermediate with an alcohol or thiol. Said phosphites are useful as stabilizers of organic polymers and lubricating oils, especially as process stabilizers for polyolefins, elastomers, polyesters and polycarbonates.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: September 8, 1981
    Assignee: Ciba-Geigy Corporation
    Inventor: John D. Spivack
  • Patent number: 4233207
    Abstract: Hydrolytically stable, ortho-alkylated phenyl phosphonites of the formula ##STR1## wherein R.sup.1 and R.sup.2 are alkyl or phenylalkyl, R.sup.3 is hydrogen, alkyl or carboalkoxyalkyl, R.sup.4 is alkyl, phenyl or phenyl substituted by alkyl, R.sup.5 is halogen, --XH or XR.sup.6 where X is O or S and R.sup.6 is phenyl substituted by alkyl, phenylalkyl or carboalkoxyalkyl, are useful as stabilizers for organic polymers and lubricating oils, particularly as processing stabilizers for polyolefins.
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: November 11, 1980
    Assignee: Ciba-Geigy Corporation
    Inventor: John D. Spivack
  • Patent number: 4233208
    Abstract: Organic polymeric materials normally subject to oxidative and ultraviolet light deterioration are stabilized by incorporating therein a compound of the formula ##STR1## wherein R is hydroxyl or chlorine, Y and Y' are independently alkyl, aralkyl or halogen, and Z is independently hydrogen, halogen, alkyl or aralkyl.
    Type: Grant
    Filed: July 12, 1978
    Date of Patent: November 11, 1980
    Assignee: Ciba-Geigy Corporation
    Inventor: John D. Spivack