Polymeric resinous material derived from limonene, dicyclopentadiene, indene and vinyl toluene
CA 2292925 A1 · Owner: Sandstrom, Paul Harry · Inventors: Ruscak, Joseph Miles; Sandstrom, Paul Harry; Wideman, Lawson Gibson
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present application relates to polymeric resinous material comprising, (1) from 5 to 70 weight percent units derived from limonene;, (2) from 5 to 70 weight percent units derived from dicyclopentadiene;, (3) from 5 to 45 weight percent units derived from indene; and, (4) from 5 to 45 weight percent units derived from vinyl toluene;, wherein the sum of the weight percent units derived from limonene and dicyclopentadiene range from 40 to 75 weight percent units of the resin and the sum of the weight percent units derived from indene and vinyl toluene range from 25 to 60 weight percent units of the resin.
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 December 22, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2021.
- 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.