Patents by Inventor Irwin B. Silverstein

Irwin B. Silverstein 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).

  • Storage stabilized oxygen degradable polymer
    Patent number: 6418702
    Abstract: This invention concerns a stabilized packaging environment for a particulate vinyl lactam polymer, particularly polyvinylpyrrolidone particles, which comprises a sealed, oxygen-impervious receptacle containing the polymer particles and a separate air permeable package within the receptacle containing a water moistened oxygen scavenging agent, preferably iron powder, an iron (II) salt, ascorbic acid or a mixture of such agents.
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: July 16, 2002
    Assignee: ISP Investments Inc.
    Inventors: Chi-San Wu, Laurence Senak, Donna Osborne, James F. Curry, Charles B. Schriver, Irwin B. Silverstein
  • Storage stabilized oxygen degradable polymer
    Publication number: 20020006522
    Abstract: This invention concerns a stabilized packaging environment for a particulate vinyl lactam polymer, particularly polyvinylpyrrolidone particles, which comprises a sealed, oxygen-impervious receptacle containing said polymer particles and a separate air permeable package within the receptacle containing a water moistened oxygen scavenging agent, preferably iron powder, an iron (II) salt, ascorbic acid or a mixture of such agents.
    Type: Application
    Filed: July 23, 2001
    Publication date: January 17, 2002
    Applicant: ISP INVESTMENTS INC.
    Inventors: Chi-San Wu, Laurence Senak, Donna Osborne, James F. Curry, Charles B. Schriver, Irwin B. Silverstein
  • Storage stabilized oxygen degradable polymer
    Patent number: 6331333
    Abstract: This invention concerns a stabilized packaging environment for a particulate vinyl lactam polymer, particularly polyvinylpyrrolidone particles, which comprises a sealed, oxygen-impervious receptacle containing said polymer particles and a separate air permeable package within the receptacle containing a water moistened oxygen scavenging agent, preferably iron powder, an iron (II) salt, ascorbic acid or a mixture of such agents.
    Type: Grant
    Filed: September 16, 1998
    Date of Patent: December 18, 2001
    Assignee: ISP Investments Inc.
    Inventors: Chi-San Wu, Laurence Senak, Donna Osborne, James F. Curry, Charles B. Schriver, Irwin B. Silverstein
  • Functionally substituted phenoxyalkyl alkoxysilanes and method for preparing same
    Patent number: 4645844
    Abstract: Novel and known functionally substituted phenoxyalkyl-, thiophenoxyalkyl- and pyridyloxyalkylsilanes are prepared by reacting substantially equimolar amounts of an alkali- or alkaline earth metal phenoxide, thiophenoxide or pyridyloxide with a haloalkylsilane under anhydrous conditions using a dipolar, aprotic solvent in combination with a liquid hydrocarbon.
    Type: Grant
    Filed: July 20, 1983
    Date of Patent: February 24, 1987
    Assignee: M&T Chemicals Inc.
    Inventors: Abe Berger, Irwin B. Silverstein
  • Process for the manufacture of non-reverting elastomeric organopolysiloxanes
    Patent number: 4166053
    Abstract: Heat-resistant, polyorganosiloxane elastomers are prepared by reacting a linear, difunctional polyorganosiloxane with a silicon-containing crosslinking agent and a stannous salt of a monoethylenically unsaturated monohydroxy monocarboxylic acid as the curing catalyst. A filler can optionally be included in the formulation. The present catalysts are unique in that they impart a relatively long working life to the uncured composition yet do not catalyze the depolymerization reaction at elevated temperatures as do conventional organotin catalysts such as dibutyltin dilaurate.
    Type: Grant
    Filed: April 5, 1978
    Date of Patent: August 28, 1979
    Assignee: M & T Chemicals Inc.
    Inventors: Emily C. Bossert, Irwin B. Silverstein, Abe Berger