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Expired Canadian patentCanada

Fuel residual handling system

CA 1331149 C · Owner: Holtermann, Theodore J. · Inventors: Holtermann, Theodore J.

CIPO record

Overview

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

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Abstract From the Canadian patent

An internal combustion engine comprising a crankcase, cylinder, a transfer passage communicating between the crankcase and the cylinder and including a first point which is the lowest point in the transfer passage and at which the transfer passage has a first cross-sectional area and a, second point which is spaced from the first point and at which the transfer passage has a second cross-sectional area less than the first cross-sectional area, whereby air flow through the transfer passage establishes a static pressure differential between the first and second points a, sump communicating with the transfer passage at the first point, and a conduit utilizing the static pressure differential …

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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 August 2, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 2, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 27, 1989
GrantedAugust 2, 1994
Term endedAugust 2, 2011
Patent numberCA 1331149 C
Classification (IPC)F02B33/04 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedJan 27, 1989Patent grantedAug 2, 1994Term endedAug 2, 2011

Sources & verification

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