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Expired Canadian patentCanada

Vacuum cleaner operable household grain cleaner

CA 1115238 A · Owner: Otness, Leslie · Inventors: Otness, Leslie

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

Abstract of the Disclosure - Small batches of grain for household use are vacuum cleaned in a portable apparatus which can receive vacuum power from the hose of a household vacuum cleaner. Grain requiring cleaning is introduced into the device through a transparent top door and gravitates into a hopper within the apparatus having a restricted grain outlet. When suction is applied through the housing of the apparatus which is vented to atmosphere, air and uncleaned grain are propelled continuously on a circuitous path until the desired clean state of the grain can be observed through the transparent door, at which time another door of the device is opened to permit clean grain to pass into a …

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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 December 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 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.
FiledJune 13, 1979
GrantedDecember 29, 1981
Term endedDecember 29, 1998
Patent numberCA 1115238 A
Classification (IPC)B07B1/04 +1 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedJune 13, 1979Patent grantedDec 29, 1981Term endedDec 29, 1998

Sources & verification

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