Expired Canadian patentCanada
Silver sensing material for use on film
CA 1304929 C · Owner: Sayles, Dennis · Inventors: Sayles, Delbert E. Sr.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The concentration of conductive metal in a paint composition is reduced to the range of 20-30% by weight by the addition of Toluene to Butyl Acetate at a weight ratio thereto of approximately 1:3 in the liquid vehicle portion of the paint.
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 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 14, 1986
GrantedJuly 14, 1992
Term endedJuly 14, 2009
Patent numberCA 1304929 C
Classification (IPC)C09D5/24 +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.