Ventilation air control unit
CA 1198309 A · Owner: Zach, Elmer S. · Inventors: Zach, Elmer S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved ventilation air control unit for use in grain drying and storage apparatus. The unit includes a pneumatic pathway unit that will accomodate a large fan blade, a motor and fan blade unit for causing air to move through the pneumatic unit, and a supplemental feed unit to provide supplemental air for delivery into the grain bin and for reducing air slippage around the fan blade.
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 December 24, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 2002.
- 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.