Unitary screw conveyor apparatus
CA 1307226 C · Owner: Martin Sprocket & Gear, Inc. · Inventors: Lapeyre, James M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Screw conveyor apparatus fabricated from integrally molded plastic modules is disclosed. The apparatus includes a multiplicity of modules axially aligned and joined or bonded so as to provide a unitary plastic screw conveyor of a desired length. A plastic axial member extending the length of the screw conveyor and which defines Ann elongated aperture of a non-circular cross-section is formed by joining or bonding the individual modules. In addition, each of the modules include a flight member which individually helically encircle not more than 360° but when bonded together result in an overall flight member encircling more than 360° and which extends the length of the joined or bonded …
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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 September 8, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 8, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.