Compatible linear and branched ethylenic polymers and foams therefrom
CA 2317856 A1 · Owner: Malwitz, Nelson E. · Inventors: Malwitz, Nelson E.; Ramesh, Natarajan S.; Lee, Shau-Tarng
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An expanded cellular ethylenic polymer product is provided from an irradiated, noncross-linked linear ethylenic polymer. Linear ethylenic polymers can be, irradiated at ambient conditions sufficient to introduce branching in the polymer in the, absence of detectable cross-linking as indicated by the absence of gels. The irradiated linear, ethylenic polymer is compatible with highly branched low density polyethylene and, when, mixed therewith, produces a resin having a single broad based melting temperature range as, determined by direct scanning calorimetry which indicates that the polymers , in the mixture have similar crystallization behavior suitable for producing low density foams …
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 September 8, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 8, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2022.
- 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.