Temperature variable nest of heat exchanger tubes for constant quantitative ratios of the exchange gases and a heat exchange process
CA 2073573 A1 · Owner: Degussa Aktiengesellschaft · Inventors: Thiel, Otto; Heumueller, Richard; Meuser, Reinhold
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nest of heat exchanger tubes is introduced for heating a gas which is at a low temperature by means of a gas at a high temperature to variable temperatures ranging from the maximum for which the installation is designed to a lower value, using a given quantitative ratio of the two gases which heat exchanger has at least one additional intake pipe connection for the low temperature gas situated in the lower region of the housing, between the intake pipe connection and discharge pipe connection for the gas to be heated near the, inflow of heating gas, and connected with a device for measuring the quantities. The system is particularly useful for producing different types of carbon black.
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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 July 10, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 10, 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
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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.