Method of and cleaning agent for the cleaning of compressors, especially gas turbines
CA 2028662 A1 · Owner: Kaes, Gertrude · Inventors: Kaes, Gertrude
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compressors of gas turbines are cleaned with a solution consisting of heteropolar-compound wash active, agents consisting of;, at least one substance selected from the group which consists of polymers and copolymers of organic unsaturated acids with a molecular weight of at least 500 capable of forming the heteropolar compounds with an alkaline cationic, wash active agents; and, at least one substance selected from the group which consists of nonionic wash active agents in a, compressor-cleaning effective concentration the solutions, in use having a metal ion content of less than 25 ppm and a pH value at said concentration between 6 and 8.
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 October 26, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 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.