Expired Canadian patentCanada
Inhibiting styrene emissions in unsaturated polyester resins
CA 1209740 A · Owner: Uss Engineers And Consultants, Inc. · Inventors: Walewski, Leonard M.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An unsaturated polyester exhibiting low styrene emissions comprises conventional phthalic and maleic anhydrides together with specific amounts of diethylene glycol, styrene, and a particular type of paraffin wax.
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 August 12, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 12, 2003.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 10, 1985
GrantedAugust 12, 1986
Term endedAugust 12, 2003
Patent numberCA 1209740 A
Classification (IPC)C08G63/16 +1 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.