Temperature cotrolled valving system
CA 1103553 A · Owner: Kaartinen, Niilo · Inventors: Kaartinen, Niilo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A procedure especially appropriate in the manipulation of small batches of liquids and an apparatus, for carrying out the procedure are based on the use of valves closable by freezing and openable with the aid of electrical heating elements. The apparatus comprises an integral system composed of chambers and of conduits connecting the chambers, wherein the conduits have been provided with the freezable valves. The transfer of liquids within the system is accomplished by means of control signals directed to the valve heating elements. The valve heating elements comprise film resistors that are incorporated in plate-like components which are employed in such manner that one component …
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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
- Granted June 23, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 23, 1998.
- 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.