Patents by Inventor Donna M. Ruszaj

Donna M. Ruszaj 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).

  • Catalysts which stabilize hydrohalocarbon blowing agent in polyisocyanurate foam formulations during polymerization
    Patent number: 5561171
    Abstract: The present invention relates to foam compositions which are expanded with hydrohalocarbon blowing agents in the presence of catalysts which are capable of decreasing the amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during the polymerization. Thus, the present invention provides compositions comprising polyisocyanate, polyol, hydrohalocarbon blowing agent, surfactant, and catalyst for polymerization of the polyisocyanate and polyol wherein the catalyst is capable of decreasing the amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during polymerization of the polyisocyanate and the polyol.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: October 1, 1996
    Assignee: AlliedSignal, Inc.
    Inventors: Timothy R. Demmin, Robert C. Parker, Richard E. Eibeck, Gary M. Knopeck, Donna M. Ruszaj
  • Catalysts which stabilize hydrohalocarbon blowing agent in polyisocyanurate foam formulations during polymerization
    Patent number: 5395859
    Abstract: The present invention relates to foam compositions which are expanded with hydrohalocarbon blowing agents in the presence of catalysts which are capable of decreasing the amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during the polymerization. Thus, the present invention provides compositions comprising polyisocyanate, polyol, hydrohalocarbon blowing agent, surfactant, and catalyst for polymerization of the polyisocyanate and polyol wherein the catalyst is capable of decreasing the amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during polymerization of the polyisocyanate and the polyol.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: March 7, 1995
    Assignee: AlliedSignal Inc.
    Inventors: Timothy R. Demmin, Robert C. Parker, Richard E. Eibeck, Gary M. Knopeck, Donna M. Ruszaj
  • Additives which stabilize hydrohalocarbon blowing agent in polyurethane and polyisocyanurate foam formulations during polymerization
    Patent number: 5137929
    Abstract: The present invention relates to foam compositions which are expanded with hydrohalocarbon blowing agents in the presence of additives which decrease the formation of haloalkenes during the polymerization. Thus, the present invention provides compositions comprising polyisocyanate, polyol, hydrohalocarbon blowing agent, catalyst, surfactant, and at least one additive wherein the additive is capable of decreasing the amount of decomposition of said dehydrohalocarbon blowing agent to haloalkenes during polymerization of the polyisocyanate and the polyol.Depending upon the polyol and polyisocyanate used and the quantity of polyisocyanate used, the compositions may be used in pour-in-place molded foams; rigid urethane spray foams; rigid high and low density foams for slabstock, froth foams, and molded foams; rigid laminated boardstock; or specialty foams.
    Type: Grant
    Filed: June 21, 1991
    Date of Patent: August 11, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Timothy R. Demmin, Richard E. Eibeck, Gary M. Knopeck, Robert C. Parker, Donna M. Ruszaj, Stephen F. Yates, George D. Green, Keith A. Horn, Willis Hammond, Raymond H. P. Thomas