Corrosion-inhibiting compositions
CA 1330799 C · Owner: Phillips, Emyr · Inventors: Wasson, Robert Craig; Phillips, Emyr
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Corrosion-inhibiting Compositions, Abstract of the Disclosure New compositions comprise an organic material and as corrosion inhibitor, and/or antioxidant at least one compound having the formula I: I, wherein R1 and R2 may be the same or different and each is hydrogen C1-C15alkyl, C3-C15alkenyl, C7-C10phenylalkyl C6-C18aryl having 6 or 10, aromatic ring carbon atoms; or C5-C12cycloalkyl; R3 is hydrogen or C1-C4alkyl; n is 0 or 1; A is a residue of a heterocyclic ring having 5-7 ring members and 1-4 nitrogen atoms, or A is a residue of a heterocyclic ring having 5-7 ring memberes and 1-4 nitrogen atoms and is fused to a further heterocyclic ring or to a carbocyclic ring, or A is a …
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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
- Granted July 19, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 19, 2011.
- 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.