Manufacture of electric light sources
CA 1088619 A · Owner: Badalex Limited · Inventors: Stephens, Stanley W.; Grenfell, Julian P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A head for a rotary turret machine for making incandescent lamps or fluorescent light tubes is capable of, sequentially, sealing a mount to the lamp envelope exhausting the interior of the envelope filling it with, a fill gas and tipping-off the exhaust tube of the mount. The head accordingly includes a sealing burner a tip-off, burner disposed coaxially within the sealing burner and around the exhaust tube with the lead-in wires disposed between the sealing and tip-off burners a coupling, connectable to a vacuum pump or to a source of fill gas and respective fuel pipes for the sealing and tip-off burners. - 1 -
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 October 28, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 1997.
- 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.