Valve stack assembly
CA 2176344 C · Owner: Framberg, Norman S. · Inventors: Framberg, Norman S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A valve stack assembly comprising a manifold (2) having an inlet channel (3) connected to a source of air. A plurality of inlet tubes (6) each having an inner end with said inlet channel (3) and the outer end of each tube projects outwardly of the manifold and is sealed within an inlet passage of a valve (1). An annular collet (10) is disposed in each inlet passage and receives the inlet tube (6). and the collet is designed such that the tube can be freely inserted in the collet but cannot be freely withdrawn unless the collet is moved axially inward to a release position. Each valve (1) also includes an outlet opening which receives an outlet tube (19) mounted in the manifold and each …
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 October 31, 1994 and granted August 31, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 31, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 31, 2016.
- 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.