Electrically grounded filter plate
CA 1103753 A · Owner: Harms, John F. · Inventors: Harms, John F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A closed filter container (20) containing at least one filter cartridge (80) mounted on a plate (60) whose periphery (70) is, clamped between the lid (40) and rim (34) of said container electrically isolating said cartridge and plate from the walls including the lid of the container as disclosed in applicant Harms' prior U.S. Patent No. 3,720,322. Mounted between the plate and a wall of the container is at least one electrically conducting resilient finger (100) which maintains electrical contact across the gasket which isolates the plate and cartridges regardless of the flexing of the plate due to variations of pressure inside the container. The plate also is provided with three handle …
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 June 23, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 23, 1998.
- 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.