Fluorescent tube coiling apparatus
CA 2085093 C · Owner: Sung, Duk-Soo · Inventors: Sung, Duk-Soo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a fluorescent tube coiling apparatus and more specifically, to an apparatus for bending for example, a 20W or 40W fluorescent lamp having a diameter of 10 mm - 17.5 mm and a length of about 40 cm two or three times, around a, screw, to make the fluorescent tube compact enough to be placed in a bulb. An apparatus according to the present invention has an upper and a lower turntable a ratchet apparatus, a fixed table, transformers a brush apparatus, an air cylinder, electric ovens, a control box, and a tube coiling apparatus. According to the present invention the coiling process of the fluorescent tube can be easily accomplished and mass production may be possible. …
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
- Filed December 10, 1992 and granted October 14, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2014.
- 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.