Method of cleaning and conditioning surfaces
CA 1256757 A · Owner: Hertron International, Inc. · Inventors: Thrower, John H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for cleaning and conditioning marble and similar substances whereby a first mixture formed from zinc sulfate solution, an abrasive, and a thickener is used to mechanically and chemically clean and prepare for the reception of a second aqueous solution formed of fluorosilicates of the group consisting of the alkaline earth metals and zinc and a, monocarboxylic aliphatic organic acid such as acetic. The first, mixture is applied with buffing means completely flushed with, water, and removed. The second solution is applied and partially removed with buffing means. As a result of these steps the, surface of the treated substance is given a brilliant glass-like finish.
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
- Granted July 4, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 4, 2006.
- 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.