Fluorinated n, n-bis-imides
CA 2065933 A1 · Owner: Ostrozynski, Robert L. · Inventors: Buchanan, Robert A.; Lin, Henry C.; Ostrozynski, Robert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case 6297, ASC/kmf, FLUORINATED N,N-BIS-IMIDES Abstract, This invention relates to novel fluorinated N,N-bis-imides of the formula, wherein R is a bivalent radical of the formula or , The compounds are particularly useful as monomers in the preparation of high performance polymer.
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 April 13, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 13, 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.