Expired Canadian patentCanada
Method for the preparation of silicone gel spheres
CA 1323155 C · Owner: Dow Corning Toray Silicone Company, Limited · Inventors: Hamada, Mitsuo; Shimizu, Koji
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Silicone gel spherical particles are prepared by continuously discharging a silicone gel composition into water while continuously moving the discharge nozzle location with respect to the surface of the water.
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 October 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 19, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 5, 1989
GrantedOctober 19, 1993
Term endedOctober 19, 2010
Patent numberCA 1323155 C
Classification (IPC)C08J3/12 +2 more
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.