Acetylene black
CA 1282575 C · Owner: Denki Kagaku Kogyo Kabushiki Kaisha · Inventors: Sugihara, Isao; Nishijima, Akio; Toriguchi, Michio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Granular acetylene black excellent in dispersibility to rubber, plastic, etc. and conductivity-endowing effect and scarce in dust scattering. The granular acetylene black is made from acetylene black wherein the half-width of the 1355 cm-1 band in the Raman spectrum is 55 cm-1 or less and the amount of iodine adsorbed is 95 mg/g or more. The method for making the granular acetylene black comprises granulating the above acetylene black using ion exchange water as a wetting agent, drying the granulated acetylene black at temperatures below 300°C and selecting, particles whose hardness is less than 5 g/particle.
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 April 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 9, 2008.
- 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.