Iodine lamp with molybdenum parts
CA 1047593 A · Owner: General Electric Company · Inventors: Holcomb, Richard H.; Danko, George K.; Roller, Robert S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A long life tungsten halogen lamp has a fused silica envelope containing a coiled tungsten filament. The filament is connected across inleads which are sealed within a pinch seal where the inleads enter the envelope. The portions of the inleads inside the envelope are of molydenum wire which has been treated to increase its ductility and reduce the concentration of impurities at the surface of the wire. The fill gas at a room temperature total pressure of at least 2,000 torr consists of nitrogen an, inert gas and an iodine-bearing component which provides from 3.1 x 10-7 to 9.6 x 10-7 gram-atoms of iodine per cubic centimeter of envelope volume.
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 January 30, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 30, 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.