Microwave cavity having a removable end wall
CA 2281150 C · Owner: Schultz, James W. · Inventors: Tatomir, Paul J.; Schultz, James W.; Ahulii, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A plurality of end caps (14, 26, 34) engagable with a microwave cavity (12) each have an underside (28) configured differently to cause the microwave cavity (12) to have different electrical responses depending on which end cap (14, 26, 34) engages the microwave cavity (12). A microwave device includes a cylindrical cavity (12) and an end cap (14) movable within the cavity (12) to change its axial position within the cavity (12) thereby varying the volume and the electrical response of the cavity (12).
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 August 30, 1999 and granted January 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 30, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 30, 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.