Liquid spray mask and method
CA 2013452 C · Owner: Marsek, Patrick W. · Inventors: Marsek, Patrick W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for coating a first portion of a configured surface having a second portion adjacent thereto to be covered by a mask before the coating is applied, thereby restricting the coating to the first portion, comprising the steps of: (a) separating the portions by surrounding at least part of the perimeter of the first portion with an edging means in the form of a thin flexible barrier strip adherent to the hereafter-specified masking solution: (b) applying to at least a part of the second portion adjacent the barrier strip, a water soluble masking solution comprising a mixture of (i) a water soluble aliphatic polyhydroxy liquid carrier, (ii) a water soluble thickener, and (iii) water;, …
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 30, 1990 and granted March 4, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 2012.
- 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.