High modulus blend of poly(.alpha.-amino acid) in rubbery elastomer
CA 2063145 A1 · Owner: Ogata, Naoya · Inventors: Ogata, Naoya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
HIGH MODULUS BLEND OF POLY(.alpha.-AMINO ACID) IN RUBBERY ELASTOMER It is frequently desirable to increase the modulus of rubbers which are utilized in a wide variety of applications. This invention discloses a technique for increasing the modulus of rubbers. By utilizing this technique, high modulus rubber compositions can be attained without sacrificing other properties such as, elongation and hysteresis. This invention more specifically relates to a process for preparing a high modulus rubber composition which comprises: (1) polymerizing at least one N-carboxyl-.alpha.-amino acid anhydride in a polymer cement of a rubbery elastomer under conditions which result in the formation of a …
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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
- Filed March 16, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 16, 2014.
- 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.