Optical device and fusion seal
CA 2204480 A1 · Owner: Corning Incorporated · Inventors: Francis, Gaylord Lee; Morena, Robert Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical device, and a method of producing the device are disclosed. The, device comprises a substrate having a near-zero or negative, coefficient of thermal, expansion and an optical component affixed to the substrate with a fusion seal the seal, being the fused product of a low melting glass frit having a positive CTE and a mill addition of a glass-ceramic having an effective negative CTE.
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 May 5, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 5, 2019.
- 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.