Emulsification of asphalt and modified asphalt with primary emulsifier polymers comprised of acrylic acid type monomers
CA 2120060 C · Owner: Portfolio, Donald C. · Inventors: Portfolio, Donald C.; Fensel, Fred A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Emulsions of asphaltic materials, such as asphalt or asphalt blends with polymers in water using copolymeric anionic emulsifiers are disclosed. The copolymeric anionic emulsifiers use ionizable carboxyl groups as their hydrophilic moiety. The emulsions using these copolymeric emulsifiers are stable allowing them to be used anywhere where asphalt or modified asphalt is used as a sealant coating, or binder. These emulsions can also be mixed with polymer latices pigments, fibers, fillers and other additives to impart particular properties specific to the type of application i.e. pigmented flexible coating compositions non-sag sealer and sealant compositions water borne adhesive compositions, …
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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 March 28, 1994 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 28, 2016.
- 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
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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.