Dust suppressant forming a resilient layer
CA 1312977 C · Owner: Carbochem Inc. · Inventors: Kremer, Henry A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dust suppressant forming a resilient layer penetrating dusting materials. This suppressant comprises at least 45% water. A water thickening agent is dissolved in water, and forms with water the dispersion medium. A coal tar pitch is dissolved in an aromatic solvent and forms the dispersed liquid which results in suspension. The aromatic solvent has generally a residual softening point of about 40-70°C (as measured by ASTM-D-36), and forms the dispersed liquid which results in the suspension. This dust suppressant has a viscosity of 3500 to 15000 cps at 25°C. A process for making same comprises: 1- adding to water having a pH of about 7 to 9, a thickening agent to form a dispersion medium …
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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 January 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 19, 2010.
- 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.