Process for producing a polymerized, heat-resistant lacquer
CA 1163739 A · Owner: International Business Machines Corporation · Inventors: Bahr, Dietrich J.; Schackert, Klaus; Briska, Marian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
After having been pretreated by kneading at its softening temperature a, cellulose acetate is subjected to block polymerization by being kneaded with, for example, an ethylene vinyl acetate copolymerizate at its mean, softening temperature. If necessary the block copolymerizate may be, subsequently cross-linked by adding a peroxide.
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
- Granted March 13, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 2001.
- 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.