Patents by Inventor Adolfas Damusis

Adolfas Damusis 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).

  • Polyurethane elastomer produced by reaction between a triazole-stabilized isocyanate prepolymer and a diamine
    Patent number: 4096128
    Abstract: A method for producing a urethane elastomer is disclosed. The method involves mixing benzotriazole or a tolyl triazole with an isocyanate terminated prepolymer while the prepolymer is at a temperature sufficiently high that it is a liquid. The proportion of benzotriazole or tolyl triazole used can range from 0.1 to 1.0 equivalent per equivalent of isocyanate in the prepolymer, and must be sufficient to increase the pot life of a mixture of the prepolymer with a diamine, but insufficient to cause substantial impairment of the physical properties of the cured elastomer. A substantially equivalent amount of a diamine is then mixed with the stabilized prepolymer, and the resulting composition is heated to produce the elastomer.
    Type: Grant
    Filed: March 3, 1977
    Date of Patent: June 20, 1978
    Inventors: Kurt C. Frisch, Adolfas Damusis
  • Dentures and process for making the same
    Patent number: 4080412
    Abstract: A denture consisting of teeth anchored in a gum member composed of a unitary mass of non-hydrophilic polyurethane elastomer, the tooth-holding portion of which is hard and the mouth-engaging portion of which is soft is prepared by first casting the teeth-holding portion about the teeth and then casting the gum holding portion onto the tooth-holding portion and curing the denture during which the gum-engaging portion and the tooth-holding portion become integrally chemically bonded into a unitary mass.
    Type: Grant
    Filed: April 20, 1977
    Date of Patent: March 21, 1978
    Assignee: Polythetics, Inc.
    Inventors: Ralph W. Colpitts, Kurt C. Frisch, Adolfas Damusis
  • Dentures
    Patent number: 4024636
    Abstract: A denture consisting of teeth anchored in a gum member composed of a unitary mass of non-hydrophilic polyurethane elastomer, the tooth-holding portion of which is hard and the mouth-engaging portion of which is soft is prepared by first casting the teeth-holding portion about the teeth and then casting the gum holding portion onto the tooth-holding portion and curing the denture during which the gum-engaging portion and the tooth-holding portion become integrally chemically bonded into a unitary mass.
    Type: Grant
    Filed: July 11, 1975
    Date of Patent: May 24, 1977
    Assignee: Polythetics, Inc.
    Inventors: Ralph W. Colpitts, Kurt C. Frisch, Adolfas Damusis