Constricted double heterostructure semiconductor laser
CA 1192977 A · Owner: Rca Corporation · Inventors: Botez, Dan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is a semiconductor laser which includes a substrate with a pair of substantially parallel grooves in a surface thereof with a mesa therebetween where the height of the surface of the mesa above the bottom of the grooves is different than the height of the major surface of the substrate above the bottom of the grooves. Layers deposited on this substrate exhibit an increased taper in thickness in the lateral direction.
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 3, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 3, 2002.
- 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.