Water soluble copolymers prepared from vinyl functional monomers
CA 2064366 A1 · Owner: Smith, Oliver W. · Inventors: Smith, Oliver W.; Hilker, Brian L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Compositions are disclosed which are useful in coating and ink applications. Such compositions comprise a copolymer of at least one vinyl ester monomer and at least one vinyl functional acid-containing monomer in which the vinyl group is separated by at least two atoms from the acid group the, copolymer more preferably having a number average molecular weight of less than 10,000 and being substantially water soluble in the neutralized state. A particularly useful vinyl functional, carboxylic acid-containing monomer is mono vinyl adipate. D-16601
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 March 27, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 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.