Carbon black exhibiting superior treadwear/hysteresis performance
CA 2073871 A1 · Owner: Green, Martin C. · Inventors: Green, Martin C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Superior treadwear/hysteresis carbon blacks having a CTAB of about 90-98 m2/g, an N2SA of about 92-102 m2/g an I2 No. of , 90-98 m2/g, a DBP of about 126-136 cc/100g a CDBP of about, 102-110 cc/100g, and a Tint of about 104-112. Also disclosed are rubber compositions containing the carbon blacks which exhibit superior treadwear/hysteresis performance properties.
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 6, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 2013.
- 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.