Embrittlement-resistant polyolefin composition and flexible articles therefrom
CA 2207889 A1 · Owner: Amos, Stephen E. · Inventors: Amos, Stephen E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An embrittlement-resistant polymer composition including:, (a) a visbroken polymer composition comprising a crystalline random copolymer of propylene and either ethylene or C4-C10 1-olefins, and (b) an amount of polymethyl propyl 3-oxy-4-(2,2,6,6tetramethyl)piperidinyl siloxane which is effective to improve the radiation resistance of the composition. Optional components include an acid neutralizing agent, and a sorbitol-based clarifier compound. The composition may be used to manufacture medical articles and food packaging material which must be sterilized either by irradiation or by autoclaving.
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
- Filed June 17, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 17, 2019.
- 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.