Modified asphalt compositions
CA 1333303 C · Owner: Case Western Reserve University · Inventors: Senz, R. John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Modified asphalt compositions are described which comprise, (A) asphalt, and, (B) a minor amount sufficient to reduce or, retard degradation of the asphalt in service of at, least one carboxy ester-containing interpolymer derived from, (B-1) at least one olefin monomer and, (B-2) at least one alpha, beta-unsaturated carboxylic acid or derivative there-, of said interpolymer having (1), pendant carboxylic acid ester groups derived from the esterification of, the carboxy groups of the interpolymer with at least one alcohol, containing at least about 4 carbon atoms. Generally, the modified asphalt composition will contain from about 0.01 to about 10% by weight based on the, weight of the …
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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 November 29, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 29, 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.