Tamper resistant valve stem cap
CA 2290041 C · Owner: Maddalena, Kris L. · Inventors: Maddalena, Kris L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A valve stem cap for pneumatic tires which has a lock mechanism to prevent theft and, unauthorized tampering with the valve. The valve stem cap comprises an inner core with a, first end adapted for threaded engagement with the valve stem of a pneumatic tire. An outer, sleeve is rotatably mounted about the inner core. Annular flanges at either end of the device, are positioned such that the inner core and outer sleeve are locked together. The second end, of the inner core forms a solid surface which is provided with keyways for engaging a, matched key. By rotating the key the inner core is rotated, which, in turn causes the threads, of the inner core to be rotated into or out of …
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 November 18, 1999 and granted August 27, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 18, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 2021.
- 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.