Low pressure mercury vapor discharge lamp and preparation thereof
CA 1250886 A · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Uchida, Minoru; Takeda, Takao; Taniguchi, Yoshiteru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Both legs of a U-shaped bulb are brought into a mutually contacting state or are opposed to each other with a space of gap and end parts of the legs are directly put on an end plate so as to form an electric discharge path in the U-shaped bulb. Since the legs are in contact with each other within limit of elastic deformation of a connecting part of the bulb breakage, of the bulb is avoidable even when an external force is applied to the bulb so as to bring the legs closer. The bulb of the present invention can be compact and easily fabricated.
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 March 7, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 7, 2006.
- 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.