Adhesive and apparatus for applying the same
CA 2001940 A1 · Owner: Springall, Ernest G. L. · Inventors: Springall, Ernest G. L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An adhesive method for preparing the same, and, apparatus for applying the same are disclosed. The adhesive is adapted to attach two substrates together in such a manner that the substrates are firmly fixed to each other in normal use, but may be released from each other when so desired. The adhesive comprises commercially available latex based adhesive, water, cornstarch and water soluble oil fixed together in such proportions as to result in a releasable adhesive. The apparatus for applying the adhesive comprises a reservoir for holding the liquid adhesive, which reservoir is connected to the applicator in a suitable manner to allow the adhesive to be delivered from the reservoir to the …
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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
- Filed November 1, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 1, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 1, 2011.
- 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.