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Expired Canadian patentCanada

Controlled volume vessel from microwave assisted chemical processes

CA 2328944 C · Owner: Hargett, Wyatt Price Jr. · Inventors: Mutterer, James Nelson Jr.; Hargett, Wyatt Price Jr.

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Abstract From the Canadian patent

A system for carrying out microwave assisted chemical reactions is disclosed. The system includes a source of microwave radiation (11); a cavity (12) in communication with the source (11), an attenuator (13) in communication with the cavity (12) for providing access to the cavity while preventing microwaves from escaping through the attenuator (13) and a vessel (16) positioned in the , cavity (12) and the attenuator (13) and extending externally of the attenuator for holding materials in the cavity while microwaves from the source are applied thereto. The vessel (16) includes a reaction chamber (23) and a venting portion (22). The chamber (23) portion is positioned entirely within …

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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 April 20, 1999 and granted September 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 20, 2019.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 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.
FiledApril 20, 1999
GrantedSeptember 9, 2003
Term endedApril 20, 2019
Patent numberCA 2328944 C
Classification (IPC)B01J19/12

Timeline

Timeline From CIPO dates

2000200220042006200820102012201420162018Application filedApril 20, 1999Patent grantedSep 9, 2003Term endedApril 20, 2019

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.