Use of aminodiol as an anticorrosive for a vapor/condensed water system and process for inhibiting the corrosion of such a system
CA 2008589 C · Owner: Taya, Shiro · Inventors: Taya, Shiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a process for inhibiting the corrosion of vapor/condensed water system, which comprises adding to boiler feed water an anticorrosive comprising 1-100% by weight of at least one aminodiol general formula: (see formula I), wherein each of R1, R2 and R3 is selected from the group consisting of each represents -H, -CH3 -C2H5 and -CH3; and n, represents an integer of 0 to 2 in an amount of 0.1 to 500 mg, per liter of said boiler feed water. The aminodiol when added, to the boiler feed water, migrates into condensed water in large quantities and inhibits corrosion of piping systems and boilers in a highly effective manner.
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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 January 25, 1990 and granted August 29, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 25, 2012.
- 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.