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Expired Canadian patentCanada

Liquid herbicide attachment for granular applicator

CA 1319917 C · Owner: Strand, Glen L. · Inventors: Strand, Glen L.

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

A liquid pesticide attachment for a granular material applicator for agricultural use which provides for injecting a metered amount of the liquid pesticide into an air stream containing a metered amount of granular material to be distributed and, having the material travel together to be deposited onto the ground. With any air distribution system for inorganic particulate material, a mixture of air and the particulate material is carried in a conduit and, a metering device is attached to provide for adding of the liquid material into the air-particulate material as it is being conveyed.

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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 July 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 6, 2010.
  • 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 26, 1989
GrantedJuly 6, 1993
Term endedJuly 6, 2010
Patent numberCA 1319917 C
Classification (IPC)A01C15/04 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedJune 26, 1989Patent grantedJuly 6, 1993Term endedJuly 6, 2010

Sources & verification

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