Sanitary sight indicator
CA 2096739 C · Owner: Purcel, David E. · Inventors: Brown, David E.; Purcel, David E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sanitary sight indicator (10) for viewing the contents of a production process is provided. The sanitary sight indicator includes a body (14) an optical unit (16), and a sanitary connection (18) between the body (14) and the optical unit (16). The body (14) includes a process-interfacing portion (32) which is adapted to interface with the production process and an optical-interfacing portion (30) which interfaces with the optical unit (16). The optical unit (16) includes a viewing portion (50) for viewing the contents of the production process and a body-interfacing portion (56) which interfaces with the optical-interfacing portion (30) of the body (14). The sanitary connection (18) …
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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 September 23, 1992 and granted December 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 2014.
- 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.