Gamma-radiation resistant polycarbonate compositions
CA 1329671 C · Owner: Krishnan, Sivaram · Inventors: Paul, Winfried G.; Krishnan, Sivaram; Lundy, Charles E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to thermoplastic polycarbonate molding compositions which are rendered resistant to gamma-radiation by incorporating therewith about 0.05 to about 10 percent by weight of a stabilizing agent selected from the group consisting of I. or, II. , wherein R is a hydrogen or a halogen atom or a C1-C10 alkyl a C6-C10 aryl, C1-C22 acyl, C6-C18 alkylaryl or a C4-C10 cycloalkyl radical, m is 1 or 3 to 6 n is an, integer of about 20 to 70 and Y is a radical conforming to, wherein R, R' and R" independently one of the others are selected from, C1-C10 alkyl and, C6-C12 aryl radicals preferably C1-C4 alkyl radical.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 17, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 17, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.