Reusable mask and method for coating substrate
CA 2342930 A1 · Owner: Dishart, Peter T. · Inventors: Dishart, Peter T.; Kadunce, Randy R.; Shumaker, Robert T. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mask article (12) and method of coating are provided whereby coating is deleted from one or more portions of a substrate like transparencies during a coating operation. The mask is a semi-rigid device having two major generally opposing surfaces (14, 16) and one or more sides (18) between such surfaces with at least one one-piece edge. The side(s) slope inward toward the interior of the solid part of the mask at an angle from the horizontal plane of the larger major surface (14) of the mask up to the slope of the side from greater than 0~ to less than 90~. This inward slope is somewhere along the side between the larger major surface and the smaller major surface (16). The …
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 9, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 9, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 9, 2021.
- 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.