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Expired Canadian patentCanada

Fiber distributor

CA 1113669 A · Owner: American Can Company · Inventors: Miller, Fredric N.

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 distributor for air-laid fibers wherein one or more impellers within a distributor housing receive fibers from a hammer mill or other source, and impel fibers smaller than a certain size through a first screen extending over the outlet opening of the distributor housing onto a moving forming wire. A partial vacuum is formed beneath the forming wire to hold the fibers thereon and to form a continuous web of fibrous material. The impellers are blades which rotate about a vertical shaft immediately above the first screen. The first screen is endless and is mounted for movement across the outlet opening of the distributor housing, in the same direction and at the same speed as the forming …

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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 December 8, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 8, 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.
FiledJune 22, 1979
GrantedDecember 8, 1981
Term endedDecember 8, 1998
Patent numberCA 1113669 A
Classification (IPC)B28B5/00 +1 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedJune 22, 1979Patent grantedDec 8, 1981Term endedDec 8, 1998

Sources & verification

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