Modified hydrophilic polyesters
CA 1319456 C · Owner: Halling, Robert Allan · Inventors: Halling, Robert Allan; Lee, Davis Emerson; Palmer, Charles Francis, Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydrophilic copolyester containing both polyoxyethylene diester and alkylene diester segments and optionally containing other components which, copolyester has been modified after being formed by reaction with one or more polyols containing three or more hydroxy groups or one or more polyoxyethylene glycols or a mixture of one or more of such polyols and one or more of such glycols. The copolyester can be used in treating fibers and films.
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 June 22, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 22, 2010.
- 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.