High light transmission, low-e sputter-coated layer systems and insulated glass units made therefrom
CA 2246980 C · Owner: Guardian Glass, Llc · Inventors: Larson, Steven L.; Hartig, Klaus W.; Lingle, Philip J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high visible light transmitting, low-E sputter coating system, achieving neutral color and non-mirror-like appearance, useful in 2-pane and 3-pane IG units is achieved by an intermediate layer of silver an undercoat, of a metal oxide or nitride having an index of refraction of 2.35-2.75 and an overcoat of a metal oxide or nitride having an index of refraction of 1.85-2.25.
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 September 14, 1998 and granted August 20, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 14, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 2020.
- 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.