Layered films for transparent substrates
CA 2315917 C · Owner: Kaiser, Wilfried · Inventors: Schmidt, Uwe; Schindler, Herbert; Schicht, Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns layered films for coating transparent substrates in particular glass substrates, comprising at least one composite oxide metal film obtained by reactive cathodic spraying and containing Zn oxide and Sn oxide. Relatively to the total amount of metal said composite metal oxide film preferably contains 0.5 to 6.5 wt. % of one or several among the elements Al Ga, In, B, Y, La, Ge, Si, P, As, Sb, Bi Ce, Ti, Zr, Nb, and Ta. In a layer of films containing a silver film as functional film the composite metal oxide film can be used as top and/or bottom low reflecting coating as diffusion barrier coating, as undercoat for a low reflecting coating and/or as top covering coat.
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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 20, 1999 and granted December 18, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 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.