Retroreflective article having a colored layer containing a dye covalently bonded to a polymer
CA 2375411 A1 · Owner: 3M Innovative Properties Company · Inventors: Fleming, Robert J.; Billingsley, Britton G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An exposed lens retroreflective article (10) that comprises a layer of optical elements (12) that are partially embedded in a binder layer (14). A reflective layer (16) is disposed functionally behind the optical elements (12) and a , colored layer (18) is disposed between the reflective layer (16) and the optical elements (12). The colored layer (18) is colored by a dye that is covalently bonded to a polymer. The exposed lens retroreflective article can retain its color and retroreflective abilities well after multiple industrial washing cycles. The article therefore may be particularly suited for use on clothing such as a fireman's jacket.
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 October 26, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2021.
- 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.