Masking films
CA 1308611 C · Owner: Steel, John · Inventors: Steel, John; Falconer, Stuart A.; Foster, David J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Masking films having the advantageous, properties of both those masking films having an intermediate adhesive layer and those masking films having a high-adhesion masking layer without an intermediate adhesive layer, include a masking layer which incorporates a cellulose ester component a, polyurethane and one or more colourants selected from dyes and pigments.
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 13, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 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.
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.