Micro-strainers for use in water purification
CA 1263319 C · Owner: Passavant (Uk) Limited · Inventors: Robson, Richard J.; Stone, Frank H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A micro-straining unit for water purification comprises a rigid, skeletal, cylindrical drum structure (50, 51, 53) having panels (49) of microfabric (15) stretched on, and attached to rigid, frames (11, 12) by uninterrupted bands of adhesive the warps and wefts of the fabric being substantially tensioned within their elastic limit. The panels are removably clamped to the outside of the skeletal drum structure thereby to form a micro-straining drum (30) each panel against all round sealing surfaces of the drum structure shaped in correspondence with the surfaces at one side of the panel frame.
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 November 28, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 28, 2006.
- 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.