Mixtures of polydiorganosiloxane-polycarbonate block co-condensates and polyisobutylenes
CA 1303268 C · Owner: Muller, Peter R. · Inventors: Grigo, Ulrich; Muller, Peter R.; Nouvertne, Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mixtures of polydiarganosiloxane-polycarbonate block cocondensates and polyisobutylenes, A b s t r a c t The present invention relates to mixtures of polycarbonates and polyisobutylenes, polydiorganosiloxanepolycarbonate block cocondensates being employed as the polycarbonates and polyisobutylene homopolymers or polyisobutylene-isoprene copolymers as the polyisobutylenes. If appropriate the moulding compositions can also contain ethylene homo- or copolymers.
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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
- Granted June 9, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 2009.
- 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.