Chip form of surface mounted electrical resistance and its manufacturing method
CA 2028043 C · Owner: Flassayer, Claude · Inventors: Flassayer, Claude; Collins, Franklyn M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The chip form electrical resistance is designed to be soldered notably on a printed circuit card or on an hybrid circuit substratum. It includes an electrically insulating substratum (1) of the ceramic type, to which is attached by mean of a layer of adhesive organic resin (2) a sheet of metal or of resistive alloy (3). The layer of resin (6) leaves in the area of the two opposite sides of the substratum (1) two, free areas (5), at the extremities of the cut-up resistive sheet (3). These two parts (5) of the resistive sheet are each covered by a thin layer (8) of a metal or alloy adhering to the resistive sheet (3), this layer (8) being covered by a second thicker layer (9) of metal or …
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 October 19, 1990 and granted March 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 2012.
- 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.