Device and method for monitoring a light-emitting device
CA 1302477 C · Owner: General Electric Company · Inventors: Hammer, Jacob M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PATENTS, RCA 82,340, DEVICE AND METHOD FOR MONITORING A LIGHT EMITTING DEVICE, Abstract of the Disclosure A light emitting device which has a substrate and a cavity region overlying the substrate. The cavity region has a grating region overlying exposed portions of the surface formed of a first grating region having a first period and a second grating region having a period different from the first region. On other portions of the cavity region an active region overlies the cavity layer and a capping layer overlies the active region. The device is monitored by forming a surface emitting device with first and second gratings with the gratings having different periods. Current is applied to …
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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 June 2, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 2009.
- 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.