Acidolysis process
CA 1064192 A · Owner: Eastman Kodak Company · Inventors: Davis, Thomas G.; Mcfarlane, Finley E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure Disclosed is an acidolysis process for preparation of terephthalate, isophthalate, hydroquinone type polyesters wherein the acidolysis process is conducted within a critical temperature range. Use of the critical temperature range provides a polyester with a low enough apparent melt viscosity to be prepared in commercial gravity, flow reactors. - i -
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 October 9, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 9, 1996.
- 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.