Photoflash lamp construction and method of making same
CA 1112066 A · Owner: Gte Sylvania Incorporated · Inventors: Armstrong, Donald E.; Sindlinger, Ronald E.; Harvey, William J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nigh-voltage type photoflash lamp filled with a filamentary combustible material and oxygen and having an ignition structure including a pair of spaced-apart lead-in wires sealed in one end of the glass envelope of the lamp and encapsulated within an interior protruding portion of the envelope glass. The termination of each of the lead-in wires within the envelope is bare of sealing glass and substantially flush with the surrounding glass surface, and a coating of primer material about the inner end of the protruding portion of glass within the envelope covers and bridges the bare terminations of the lead-in wires. Also disclosed is a method of making a lamp including the steps of heating …
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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 November 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 1998.
- 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.