Expired Canadian patentCanada
Liquid heteric-block polyoxyalkylene compounds having improved flowability characteristics
CA 2216015 C · Owner: Gopalkrishnan, Sridhar · Inventors: Otten, Jay G.; Gopalkrishnan, Sridhar; Schaefer, Anthony G.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to liquid polyoxyalkylene compounds having improved flowability characteristics useful in a variety of industrial and personal care applications.
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 October 9, 1997 and granted April 16, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 9, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 9, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 9, 1997
GrantedApril 16, 2002
Term endedOctober 9, 2017
Patent numberCA 2216015 C
Classification (IPC)C08G65/32 +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.