Gypsum compositions
CA 1105503 A · Owner: Idemitsu Kosan Company Limited · Inventors: Takyu, Toshiyuki; Inoue, Masaru; Shiho, Shinho
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gypsum composition comprising: (A) a lightweight spherical gypsum and (B) at least one binder selected from the group consisitng of a water-soluble organic polymer a water-dispersible, organic polymer, a water-soluble inorganic compound a water-, dispersion medium colloid-forming inorganic compound a water-, hardenable compound and a mixture thereof. This gypsum composition provides a gypsum mold which is lightweight and at the same time, has a great mechanical strength. - 1 -
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 July 21, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 1998.
- 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.