Leather treatment compositions
CA 2104264 A1 · Owner: Allen, Adrian S. · Inventors: Allen, Adrian S.; Aiston, Finlay D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Leather Treatment Compositions A copolymer for use in rendering leather water repellant is formed from ethylenically unsaturated monomer and ethylenically unsaturated monofunctional monomer wherein the monomers include mono- or di- fatty alkyl ester of dicarboxylic acid and a free carboxylic acid monomer and provide a carboxylic acid equivalent weight of 100 to 1000 and at least 20% by weight of fatty alkyl groups.
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 17, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 17, 2015.
- 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.