Both ends-modified olefin polymers and processes for the production thereof
CA 2050273 A1 · Owner: Tonen Corporation · Inventors: Ueki, Satoshi; Furuhashi, Hiroyuki; Koyama, Naomi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Both ends-modlfied olefin polymers and processes for the production thereof ABSTRACT OF THE DISCLOSURE, Polymers of olefins such as ethylene and propylene having functional, groups Introduced into both-the ends thereof can be provided which are useful, as macromonomers for polycondensation. This new polymer comprises a recurring unit represented by the general formula -( - CH,- CHR -) - and having functional groups bonded to both the ends of the polymer and a number average molecular weight of 300 to 500,000, the functional groups being selected from the group consisting of H2C=CH- group and group wherein X is -OH, -OR', a halogen atom or -SO3R2 R1 is a hydrocarbon group of 1 to 5 carbon …
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 August 29, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 29, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 29, 2013.
- 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.