Patent Yard Sign in
Expired Canadian patentCanada

Combination fertilizer applicator and tillage implement with adjustable sweep assemblies

CA 1165631 A · Owner: Dmi Inc. · Inventors: Dietrich, William J. Sr.

CIPO record

Overview

Drawings and full text

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

Open the CIPO record

Abstract From the Canadian patent

Apparatus for combining light tillage and application of liquid fertilizer in a single implement includes a frame having at least a forward and a rear mounting bar. A plurality of sweep assemblies are mounted to the forward mounting bar. Anhydrous fertilizer applicator knives are mounted to the rear bar and located in strips left untilled by the sweeps. A finishing harrow is also mounted to the rear bar behind the knives to level the soil. Each sweep assembly includes a forward bar or frame element to which a plurality of laterally spaced sweeps are mounted in staggered relation. Mounting members having vertically elongated slots mount the sweep assemblies to the forward bar of the frame …

Read the whole patent

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 April 17, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 17, 2001.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 27, 1981
GrantedApril 17, 1984
Term endedApril 17, 2001
Patent numberCA 1165631 A
Classification (IPC)A01C23/02 +1 more

Timeline

Timeline From CIPO dates

1982198419861988199019921994199619982000Application filedOct 27, 1981Patent grantedApril 17, 1984Term endedApril 17, 2001

Sources & verification

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