Infrared reflecting articles
CA 1111692 A · Owner: Chang, Leei · Inventors: Chang, Leei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure Articles having an interference coating which reflects infrared energy are disclosed. The coating has a period of three layers in which the first and third layers are a refractory dielectric material and the intermediate or, second layer, is silver. If the period is repeated once the cut-off between transmission and reflection is sharper than the coating having a single period.
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 November 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 1998.
- 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.