Expired Canadian patentCanada
Multi-directional light control film
CA 2017001 C · Owner: Bellus Peter A. · Inventors: Bellus Peter A.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A light control filan includes a light transanissive matrix sheet and a plurality of opaque aciculae disposed throughout the sheet and oriented such that the longitudinal axis of each of the acicula is generally perpendicular to the face of the sheet.
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
- Filed May 17, 1990 and granted April 17, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 17, 1990
GrantedApril 17, 2001
Term endedMay 17, 2010
Patent numberCA 2017001 C
Classification (IPC)B29D11/00 +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.