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Expired Canadian patentCanada

Material conveying apparatus

CA 1089321 A · Owner: Morgen Manufacturing Co. · Inventors: Castle, Harold J.

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

An apparatus for conveying materials having first and second support members movable longitudinally with respect to each other a, third support member positioned between the first and second support members and movable along a line extending therebetween first and, second rigid conduit sections having one end supported respectively by the first and second support members and a third rigid conduit section having its ends swivelly connected to the other ends of the first and second conduit sections and supported by the third support member whereby as the first and second support members move longitudinally with respect to each other, the first, second and third conduit sections expand and …

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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 November 11, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 11, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 9, 1977
GrantedNovember 11, 1980
Term endedNovember 11, 1997
Patent numberCA 1089321 A
Classification (IPC)B67D99/00 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedDec 9, 1977Patent grantedNov 11, 1980Term endedNov 11, 1997

Sources & verification

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