Expired Canadian patentCanada
Process and catalyst-inhibitor systems for preparing poly(1,4-cyclohexenedimethylene terephthalate)
CA 2086011 C · Owner: Eastman Kodak Company · Inventors: Sublett, Bobby Jones
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a process for preparing polyesters of dimethyl terephthalate with 1.4-cyclohexanedimethanol using a catalyst comprising a titanium alkoxide and an alkaline earth metal salt.
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 June 25, 1991 and granted August 5, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 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.
FiledJune 25, 1991
GrantedAugust 5, 1997
Term endedJune 25, 2011
Patent numberCA 2086011 C
Classification (IPC)C08G63/18 +2 more
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.