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Expired Canadian patentCanada

Air filtering and distribution for laminar flow clean room

CA 1265950 C · Owner: Soltis, Charles W. · Inventors: Soltis, Charles W.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A membrane diffusion panel for distributing air in a filtered environmentally controlled enclosure. The panel includes a translucent support panel having a plurality of apertures extending therethrough, the panel comprising at least 50% open area for allowing air passage. A translucent porous membrane sheet is mounted on the support panel, the membrane sheet comprising a structure of continuous filament fibres. The membrane sheet is porous and provides a predetermined resistance to flow of the air so that the membrane diffusion panel cooperates to provide uniform air flow through the environmentally controlled enclosure.

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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 February 20, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 20, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 21, 1986
GrantedFebruary 20, 1990
Term endedFebruary 20, 2007
Patent numberCA 1265950 C
Classification (IPC)F24F7/00

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedFeb 21, 1986Patent grantedFeb 20, 1990Term endedFeb 20, 2007

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.