Poly(isopropenyl esters) as carboxylic acid release agents on tobacco
CA 1089210 A · Owner: Philip Morris Incorporated · Inventors: Grubbs, Harvey J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Invention, This invention provides carboxylic acid flavorantrelease oligomeric and polymeric derivatives corresponding to the structural formula:, wherein R is a member selected from aliphatic alicyclic, and, aromatic hydrocarbon radicals and n is an integer. The oligomeric and polymeric derivatives are stable when used in smoking products and on pyrolysis release the carboxylic acid flavorants to enhance the flavor and aroma of the smoke.
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 November 11, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 11, 1997.
- 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.