Valve packing extractor and valve gland cleaner
CA 2198664 C · Owner: Durant, Raymond J. · Inventors: Durant, Raymond J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for quickly and efficiently removing valve packing from a valve of the type having a threaded or non-threaded valve stem. In general the apparatus includes a sleeve adapted to be positioned about the portion of the valve stem which extends exteriorly of the packing. The sleeve is rotatably connected to a translation mechanism operable in conjunction with the exposed portion of the valve stem. Depending on the type of valve and whether the exposed portion of the valve stem is threaded or smooth and whether or not the valve stem is capable of rotation the translation mechanism can either be threadingly mated or clamped onto the valve stem to cooperate therewith for translating …
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
- Filed February 27, 1997 and granted October 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.