Molecular level cleaning of contaminants from parts utilizing an environmentally safe solvent
CA 2284792 C · Owner: Lawrence Industries, Inc. · Inventors: Priest, James L.; Clark, Lawrence A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a solvent mixture comprising n-propyl bromide a , mixture of low boiling solvents and preferably, a defluxing and/or ionics removing additive and/or at least one saturated terpene. The invention also provides a method of cleaning an article (e.g. an electrical plastic, or , metal part) in a vapor degreaser using the solvent mixture. The solvent mixture of the invention is non-flammable non-corrosive, and non-hazardous. , In addition it has a high solvency and a very low ozone depletion potential. Thus, using the solvent mixture of the invention oil, grease, rosin flux, and , other organic material can be readily removed from the article of interest in an …
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 28, 1997 and granted January 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 28, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 28, 2019.
- 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.