Slip free vertical rack design
CA 2218518 C · Owner: Saint-Gobain/Norton Industrial Ceramics Corporation · Inventors: Tomanovich, John A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a vertical rack for supporting a plurality of semiconductor wafers in a spaced substantially horizontal, parallel relation the vertical, rack comprising:, a) a vertical support means and, b) a plurality of vertically spaced horizontal support, means extending substantially horizontally from the vertical support means to define a plurality of support levels for supporting the wafers, wherein the horizontal support means are projections each, projection comprising an arm terminating in a wafer platform such that the innermost contact between at least one wafer platform of each support level and its supported wafer is in the region of between 20% and 80% of 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 May 3, 1996 and granted October 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 3, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 3, 2018.
- 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.