Abrasion wear resistant polymeric substrate product
CA 2090110 A1 · Owner: Finke, Steven James · Inventors: Kimock, Fred M.; Finke, Steven James; Knapp, Bradley J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A substantially optically transparent coated substrate product (1) with a highly adherent, abrasion-resistant diamond-like hard carbon coating (4) is disclosed. The substrate product is comprised of a polymeric substrate (1), and adhesion-mediating polysiloxane polymer layer (2), one or more intermediate layers (3) and an outer layer of diamond-like hard carbon (4). The invention also allows for the production of adherent thin film interference layer coatings (i.e. quarter wavelength stacks and anti-reflection coatings) using diamond-like hard carbon as the high refractive index layer and the interlayer(s) as the low refractive index layer or, alternatively, using diamond-like hard carbon …
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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 1, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 1, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 1, 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.
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.