High organic peroxide content polypropylene
CA 2061289 A1 · Owner: Ostanek, Leonard J. · Inventors: Dorn, Richard H.; Petticord, Daniel F.; King, Mark J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
33003CA, Abstract of the Disclosure, A homogenous free-flowing, resin containing 80 to 90 weight percent of polypropylene and 10 to 20 weight percent of liquid organic peroxide where, the weight percents are based on the total weight of the polypropylene and the liquid organic peroxide, is provided. Furthermore a process is provided for, producing this polypropylene by mixing 80 to 90 weight percent of polypropylene, in the form of 100-500 micron particles with 10 to 20 weight, percent of liquid organic peroxide where the weight percents are based on the total weight of the polypropylene and the liquid organic peroxide.
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 February 17, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 2014.
- 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.