High pressure sodium discharge tube support structure
CA 1308159 C · Owner: North American Philips Corporation · Inventors: Gibson, Ray G.; Droho, Joseph Steven; Ravi, Jagannathan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high pressure sodium lamp has an outer envelope containing a rare gas at a pressure of approximately one atmosphere. A metallic reflective layer is disposed on a portion of the outer envelope for defining a reflector. Mounting means mounts the discharge device of the lamp within the outer envelope and is comprised of a pair of conductors for providing a conductive path to the discharge device. The pair of conductors are configured to have a breakdown voltage between them greater than a certain value and to maintain, the breakdown voltage between the conductors and the metallic reflector greater than the certain value.
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 29, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 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.