Constant temperature sorption hygrometer
CA 1314412 C · Owner: Djorup, Robert S. · Inventors: Djorup, Robert S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A constant temperature sorption hygrometer comprising a differential pair of substrate-supported heated metal film sensing elements, one coated with a hygroscopic layer of microporous aluminum oxide and the other coated with a non-hygroscopic protective coating or uncoated, both operated by feedback controlled constant temperature bridge circuits; together with alternate forms of hygrometer transducer apparatus employing differential sorption detection of water vapor.
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 March 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 16, 2010.
- 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.