Patents by Inventor David C. Armbruster

David C. Armbruster 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).

  • Process of coating weatherable, abrasion resistant coating and coated articles
    Patent number: 4170690
    Abstract: A weatherable coating composition, especially for imparting abrasion resistance to thermoplastic substrates, comprising about 30-50 parts by weight of a colloidal silica and about 50 to 70 parts by weight of a mixture of (i) dialkyldialkoxysilane and (ii) alkyl trialkoxysilane wherein the weight ratio of (i) to (ii) is about 1:19 to about 1:4. A method of applying the coating composition to a substrate and coated articles are also disclosed.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: October 9, 1979
    Assignee: Rohm and Haas Company
    Inventors: David C. Armbruster, William F. Fischer
  • Weatherable, abrasion resistant coating composition, method, and coated articles
    Patent number: 4159206
    Abstract: A weatherable coating composition, especially for imparting abrasion resistance to thermoplastic substrates, comprising about 30-50 parts by weight of a colloidal silica and about 50 to 70 parts by weight of a mixture of (i) dialkyldialkoxysilane and (ii) alkyl trialkoxysilane wherein the weight ratio of (i) to (ii) is about 1:19 to about 1:4. A method of applying the coating composition to a substrate and coated articles are also disclosed.
    Type: Grant
    Filed: March 18, 1977
    Date of Patent: June 26, 1979
    Assignee: Rohm and Haas Company
    Inventors: David C. Armbruster, William F. Fischer