Abrasive articles prepared from crosslinked aromatic polyimides
Patent 4142870 Issued on March 6, 1979. Estimated Expiration Date: 
August 15, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 15, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorAssigneeApplicationNo. 05/824731 filed on 08/15/1977US Classes:51/298, WITH SYNTHETIC RESIN524/600, Carboxylic acid contains three or more acid groups or derivative thereof525/432, Mixed with additional polycarboxylic acid and a polyamine; amino carboxylic acid or derivative; polyamine salt of a polycarboxylic acid; lactam; or polymer derived therefrom525/436Solid polymer derived from compound containing more than two carboxylic acid groups or derivatives thereofExaminersPrimary: Lieberman, PaulAttorney, Agent or FirmInternational ClassesC08G 73/10 (20060101)C08G 73/00 (20060101) AbstractAn abrasive article comprising a filler distributed in a matrix or binder of polyimide polymeric material of a crosslinked combination of two linear aromatic polyimide polymers. These articles exhibit a retention of physical properties at high temperatures. | |
