Patent Yard Sign in
Expired Canadian patentCanada

Method and apparatus for solid waste disposal

CA 1284142 C · Owner: Wojciechowski, Christopher R. · Inventors: Wojciechowski, Christopher R.; Wojciechowski, Michael C.

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

The present invention contemplates a multi-level collection area of solid waste products. On a top level of the collection site ramp ways for trucks are, provided so that the trucks may dump solid waste into a central collection opening. Gravity feeds the solid waste into a centrifugal spinner. The spinner includes radial agitator blades. The solid waste is spun and agitated on the spinner and centrifugal force tends to push the solid waste to the outer edge of the spinner. The spinner angles upward from the center to an outlet slot of uniform size disposed about the circumference of the spinner. A cover is disposed over the spinner having a plurality of fixed teeth disposed thereon. The …

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 May 14, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 2008.
  • 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 29, 1989
GrantedMay 14, 1991
Term endedMay 14, 2008
Patent numberCA 1284142 C
Classification (IPC)B02C18/08 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedMay 29, 1989Patent grantedMay 14, 1991Term endedMay 14, 2008

Sources & verification

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