Multi-wavelength optical filter
CA 1061534 A · Owner: American Optical Corporation · Inventors: Woodcock, Richard F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A multi-wavelength optical filter, particularly useful for shielding against laser light, includes compounds incorporated into a glass base which produces Cu2+ ions Er3+ ions, and Ce3+, ions, thereby providing a filter having desired optical densities at 488 nm, 515 nm, 671 nm, 694 nm, 1060 nm 840-900 nm, 347 nm, and 337 nm.
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 September 4, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 4, 1996.
- 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.