Latex for aggregate treatment
CA 2301928 A1 · Owner: Schulz, Gerald Owen · Inventors: Schulz, Gerald Owen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The antistrip characteristics of aggregate in asphalt concrete can be improved by coating the aggregate with certain latices. By doing so the, aggregate is provided with a higher level of resistance to stripping by water. For instance aggregate can be coated with latex by: (1) mixing the aggregate with latex to form a latex/aggregate mixture; (2) heating the latex/aggregate mixture to a temperature which is within the range of about 66°C to about 232°C; and (3) maintaining the latex/aggregate mixture at said elevated temperature for a time which is sufficient to reduce the moisture content of the latex/aggregate mixture below about 0.7 weight percent and to allow the polymer in the latex to …
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 March 21, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 21, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 2022.
- 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.