Patents by Inventor Richard Spector

Richard Spector 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).

  • Hetero nitrogen containing compounds and polymerms light stabilized with said compounds
    Patent number: 4555537
    Abstract: Compounds of the formula: ##STR1## are disclosed as light stabilizers for polymers normally subject to degradation by light.
    Type: Grant
    Filed: August 8, 1983
    Date of Patent: November 26, 1985
    Assignee: American Cyanamid Company
    Inventors: Richard Spector, Donald R. Maulding
  • Polyolefin light stabilizers
    Patent number: 3984348
    Abstract: O,O-Bis(aryl)amidothiophosphates, useful as light stabilizers in polyolefins, are those having the formula: ##EQU1## wherein: R is hydrogen, alkyl of 1-12 carbons, or halogen; Ar is phenyl or naphthyl; n is 1 or 2; and R' and R", which may be the same or different, are each selected from the group consisting of hydrogen, alkyl of 1-18 carbons, 2,2,6,6-tetramethyl-4-piperidyl, cycloalkyl of 5-6 carbons or both R' and R", together with the N to which they are attached, form a morpholino or piperidino ring. Such compounds are made by reacting PSCl.sub.3 with two moles of a phenol and then the product thereof with an amine.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: October 5, 1976
    Assignee: American Cyanamid Company
    Inventors: Richard Spector, Joseph Anthony Stretanski
  • Dialkylsulfonamide dyes
    Patent number: 3962245
    Abstract: Novel dyes for plastic substrates which act as filters in such substrates for argon and double-frequency neodymium laser beams are sulfonamide derivatives of 12-H-naphthoperinone. These dyes are soluble in and compatible with the plastic substrate and provide stability to ultraviolet light.
    Type: Grant
    Filed: January 16, 1975
    Date of Patent: June 8, 1976
    Assignee: American Cyanamid Company
    Inventors: Robert Jerome Tucker, Richard Spector
  • N-(2,2,6,6-tetramethyl-4-piperidyl) substituted amidothio phosphates
    Patent number: 3957798
    Abstract: 0,0-Bis(aryl)amidothiophosphates, useful as light stabilizers in polyolefins, are those having the formula: ##EQU1## wherein: R is hydrogen, alkyl of 1-12 carbons, or halogen; Ar is phenyl or naphthyl; n is 1 or 2; and R' and R", which may be the same or different, are each selected from the group consisting of hydrogen, alkyl of 1-18 carbons, 2,2,6,6-tetramethyl-4-piperidyl, cycloalkyl of 5-6 carbons or both R' and R", together with the N to which they are attached, form a morpholino or piperidino ring. Such compounds are made by reacting PSCl.sub.3 with two moles of a phenol and then the product thereof with an amine.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: May 18, 1976
    Assignee: American Cyanamid Company
    Inventors: Richard Spector, Joseph Anthony Stretanski