Document shredding machine
CA 2053252 A1 · Owner: Herbst, David E. · Inventors: Herbst, David E.; Kimbro, Charles D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A shredding mechanism having a continuous stripper to strip shredded material from the cutting surface of the shredding mechanism and having a bearing support for rotatably carrying the shafts of cutting cylinders (230). The stripper consists of upper teeth (210) integrally formed on the inside surface of a top housing and bottom teeth (266) integrally formed on the inside of a bottom base. The bearing support comprising two bearing plates (242 244) , integrally formed onto the inside surface of the bottom base. The bearing plates have semicircular indentations (246 248, 250, 252) to rotatably carry the shafts of cutting cylinders.
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
- Filed August 21, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 21, 2012.
- 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.