Coating of granular aromatic diamine
CA 1284920 C · Owner: Iwai, Kazuo · Inventors: Kanazawa, Teiichi; Iwai, Kazuo; Oyaizu, Yoshijiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
By coating the surface of granular harmful aromatic diamine with an organic coating agent consisting of aromatic diamine having no variant-causing property at least one, kind selected from glycols and a synthetic resin having solubility parameter of 9.0 or higher, it has been made possible without damaging the essential performance as a hardening agent, etc. to handle in a safe manner aromatic, diamine that has been regarded as harmful.
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 June 18, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 18, 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.