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Expired Canadian patentCanada

Pyrotechnic variable delay connector

CA 1255537 A · Owner: Simon, James R. · Inventors: Mclaughlin, Henry; Kelly, George G.; Simon, James R.

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

Pyrotechnic Variable Delay Connector" A field adjustable delay connector for use in detonating cord hook-ups for multi-charge blasting particularly adapted to work effectively with low energy shock or detonating cord. The delay connector is so constructed that the donor cord initiates combustion in a variable length of burning composition,the length being mechanically adjustable by the blaster during hook-up.

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.

Why it's free to use

  • Granted June 13, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 13, 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.
FiledSeptember 26, 1986
GrantedJune 13, 1989
Term endedJune 13, 2006
Patent numberCA 1255537 A
Classification (IPC)C06C7/00 +2 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedSep 26, 1986Patent grantedJune 13, 1989Term endedJune 13, 2006

Sources & verification

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