Patents by Inventor G. Robert Collins

G. Robert Collins 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).

  • Antistatic polyurethane-urea dispersions
    Patent number: 4920167
    Abstract: Disclosed is dispersion of a polyurethane-urea polymer in a continuous phase. This dispersion contains about 0.1 to about 5 parts by weight of an ionizable, non-volatile salt per 100 parts by weight of polyurethane-urea polymer. Polyurethane-urea coatings made from this dispersion have excellent static dissipative properties.
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: April 24, 1990
    Assignee: The Dow Chemical Company
    Inventors: Sven H. Ruetman, Joginder N. Anand, G. Robert Collins
  • Plastic optical fiber for in vivo use having a bio-compatible polyureasiloxane copolymer, polyurethane-siloxane copolymer, or polyurethaneureasiloxane copolymer cladding
    Patent number: 4836646
    Abstract: The present invention pertains to a flexible organic polymeric optical fiber core having an adherent flexible organic polymer cladding on the outer surface. More particularly, the invention relates to an organic polymeric optical fiber having a polyureasiloxane copolymer, polyurethane-siloxane copolymer, or polyurethaneurea-siloxane copolymer cladding for in vivo use in the tissue of a living mammal, preferably a human being. In addition to compatibility in live tissue and body fluids, the fiber must be capable of repeatedly being deformed in a small bend radius without losing the ability to transmit light. The clad optical fibers useful to measure levels of components (e.g. pH, oxygen, carbon dioxide) in living, moving tissue, such as the heart or lungs.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: June 6, 1989
    Assignee: The Dow Chemical Company
    Inventors: Theodore L. Parker, G. Robert Collins