Fluid control system and valve to be used therein
CA 2173267 C · Owner: Ohmi, Tadahiro · Inventors: Ohmi, Tadahiro; Yamaji, Michio; Ikeda, Nobukazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluid control system, and its valve assemblies are, used to control the feeding of fluids accurately (by operating (opening and closing) valves promptly and accurately), for the manufacture of semiconductors magnetic thin films, biotechnical products and other, products. The fluid control system comprises a principal control line (L) and plural branch control lines (L1 L2, ...) for feeding plural types of fluid (G1 G2,...) into a, processing device (C) coupled to the principal control line, and plural valve assemblies (V) incorporated in the branch control lines (L1, L2,...) for switching the fluids (G1, G2,...) supplied into the processing device (C). Each of the valve assemblies (V) …
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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 April 2, 1996 and granted November 9, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 2, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 2, 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.