Class j time delay fuse
CA 2044686 C · Owner: Douglass, Robert S. · Inventors: Douglass, Robert S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A time-delay fuse (10) having parallel fusible element (22). The fuss element (22) is connected to a trigger mechanism (30) by solder or other meltable alloy. The trigger section (30) provides overload protection and the parallel fuse elements (22) provide short circuit protection resulting in a time-delay fuse which can be used in places where there are size restrictions.
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 June 14, 1991 and granted March 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 14, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 2013.
- 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.