Capping cement for electric lamps
CA 2460487 A1 · Owner: Wilhelm, Armin · Inventors: Schoenwetter, Johann; Wilhelm, Armin; Schirmer, Rainer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a lamp-capping cement for electric lamps that contains poly-paraphenylene-terephthalamide as the thixotropic element. According to the invention, the poly-paraphenylene-terephthalamide is used in lamp-capping elements to adjust viscosity especially to reduce the fluidity , of the cement.
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 September 5, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 5, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 2024.
- 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.