Method of coating a transparent substrate
CA 1203503 A · Owner: Flachglas Aktiengesellschaft · Inventors: Groth, Rolf; Muller, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Optical filters e.g. for reflecting infrared radiation while passing visible light radiation made by applying to the silver reflective coating a protective coating of a metal oxide by magnetron cathode sputtering and only thereafter is the non-reflective layer applied by magnetron cathode sputtering. The protective coating-oxygen partial pressure and coating rate are substantially less than the non-reflective coating-oxygen partial pressure and coating rate. Apparently the protective coating prevents damage to the reflective coating.
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
- Granted April 22, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 22, 2003.
- 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.