Method for rendering non-porous surfaces water repellent
CA 1069257 A · Owner: Savage, James D. · Inventors: Savage, James D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention comprises a method and composition for treating nonporous surfaces to render them water repellent. The composition consists of a mixture of mineral acid and a solvent to which a polysiloxane of general formula:, is added R1 and R2 are alkyl aryl or hydrogen groups and n is an, integer greater than 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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- 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.