Method for simultaneous control of cleaning and hygiene and agent for use when carrying out the method
CA 2057008 A1 · Owner: Isoline A/S · Inventors: Famme, Per B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For simultaneous control of cleaning and hygiene in particular, in the food industry and hospitals an aqueous solution of an, optionally fluorescent dye or a combination of such dyes which bind on organic material, including microorganisms and colour them in , the process is applied onto the surfaces which are to be cleaned. An organic contamination if any, of the surfaces will then show itself by colouring thereof. Among the usable dyes the disodium salt of 2,4,5,7-tetraiodofluorescein is preferred. Hereby the disadvantages attached to the known methods of controlling the hygiene level at work sites and in institutions are avoided in, particular the time delay of as much as 4 days caused …
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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 May 16, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 16, 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.