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Expired Canadian patentCanada

Ink level control for ink jet printer

CA 1205676 A · Owner: Ncr Corporation · Inventors: Thomas, Jacob E.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Abstract of the Disclosure, The level of ink in a reciprocating reservoir is automatically controlled for both printing and nonprinting conditions. The reciprocating motion creates forces to cause the ink to move back and forth between the reciprocating reservoir and a main stationary reservoir and to maintain the ink at one level during printing. A check valve controls direction and flow of ink moving between the reservoirs and allows the ink to rise in the first-mentioned reservoir during non-printing.

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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 10, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 10, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 31, 1983
GrantedJune 10, 1986
Term endedJune 10, 2003
Patent numberCA 1205676 A
Classification (IPC)B41J2/17

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedMay 31, 1983Patent grantedJune 10, 1986Term endedJune 10, 2003

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.