Transition from continuous to intermittent process stage, method and device
CA 2203235 A1 · Owner: Grenner, Dieter · Inventors: Hetzel, Hartmut; Grenner, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and a device consisting of a continuous process stage and a subsequent intermittent process stage are described the product, outlet of the continuous process stage being provided with a retarding device which is operated at intervals, so that an intermediate buffer vessel is unnecessary.
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 April 21, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2019.
- 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.