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Expired Canadian patentCanada

Fuel compositions

CA 1270645 C · Owner: Brois, Stanley James · Inventors: Brois, Stanley James; Lewtas, Kenneth

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A fuel composition comprising a distillate fuel oil and a wax crystal modifier of a derivative, of (1) a monocyclic compound having at least 7 ring atoms or of (2) a polycyclic compound, said derivative comprising two substituents attached to adjoining ring atoms in the ring of derivative (1) or in one of the rings of derivative (2). One of said substituents is an amide or a salt of a secondary amine and the other of said substituents is an amide of a primary or secondary amine, a salt of a primary secondary or tertiary amine, a quaternary ammonium salt or an ester, each substituent containing at least one hydrogenand carbon-containing group of at least 10 carbon atoms.

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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 June 26, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 26, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 24, 1986
GrantedJune 26, 1990
Term endedJune 26, 2007
Patent numberCA 1270645 C
Classification (IPC)C10L1/22 +2 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedApril 24, 1986Patent grantedJune 26, 1990Term endedJune 26, 2007

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.