Expired Canadian patentCanada
Lamina comprising cube corner elements and retroreflective sheeting
CA 2776416 C · Owner: 3M Innovative Properties Company · Inventors: Smith, Kenneth 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 present invention is directed to lamina(e) comprising cube corner elements a tool comprising an assembly of laminae and replicas thereof. The invention further relates to retroreflective sheeting.
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 February 26, 2004 and granted December 2, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 26, 2004
GrantedDecember 2, 2014
Term endedFebruary 26, 2024
Patent numberCA 2776416 C
Classification (IPC)G02B5/12
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.