Patent Yard Sign in
Expired Canadian patentCanada

Method of packing long-sized porous bodies and a hydraulic cylinder utilizing same

CA 1257176 A · Owner: Upravlenie Po Montazhu, Demontazhu I Remontu Gornoshakhtnogo Oborudovania "Spetsshakhtomontazh" Karagandinskogo Proizvodstvennogo Obiedinenia Po Dobyche Uglya "Karagandaugol" · Inventors: Negrutsky, Boris F.; Negrutsky, Sergei B.; Klimov, Sergei B.

CIPO record

Overview

Drawings and full text

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

Open the CIPO record

Abstract From the Canadian patent

A b s t r a c t o f the D i s c l o s u r e The method of packing long-sized porous bodies moved between zones of different pressure, wherein the porous body moved between zones of different pressure reciprocates through a pressurized packing agent. The packing agent is an agent possessing thixotropic properties and supplied continuously to the porous body under pressure exceeding the pressure in a higher pressure zone while the porous body is impregnated with a thixotropic packing agent such that the cross-section of the porous body throughout the entire length thereof be filled with packing agent. The hydraulic cylinder utilizing said method comprises a chamber filled with a …

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 July 11, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 11, 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.
FiledJanuary 10, 1985
GrantedJuly 11, 1989
Term endedJuly 11, 2006
Patent numberCA 1257176 A
Classification (IPC)F15B15/20 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedJan 10, 1985Patent grantedJuly 11, 1989Term endedJuly 11, 2006

Sources & verification

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