Canadian application, no grantCanada
Polarized film for headlamps
CA 2033891 A1 · Owner: Boughner, Robert L. · Inventors: Boughner, Robert L.; Boughner, Robert L.
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 glare from oncoming and following vehicles make night driving somewhat hazardous. By properly orienting polarized film on windshields head lamps, mirrors and glasses glare will be reduced.
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 January 10, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 2013.
- 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 10, 1991
GrantedNo grant recorded
Term endedJanuary 10, 2011
Patent numberCA 2033891 A1
Classification (IPC)G02B5/30
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.