Portable toilet with vent means for the holding tank
CA 1085551 A · Owner: Thetford Corporation · Inventors: Sargent, Frank T.; Antos, John M.; Lindsay, Erin J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for venting a sealed holding tank of a portable toilet to equalize the atmosphere and tank pressures before opening and closing the inlet port of the holding tank said holding tank includes a valve assembly for opening and closing the inlet port of the tank, and a vent port means in the tank associated with the valve assembly so that when the valve assembly is moved toward its open position the vent means will, be opened immediately prior to opening of the inlet port and when the valve assembly is moved toward its closed position the, vent port will be closed immediately after closing of the inlet port.
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 September 16, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 16, 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.
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.