Methods and devices for detecting bacteriophage
CA 2286463 A1 · Owner: Minnesota Mining And Manufacturing Company · Inventors: Wicks, James H.; Krejcarek, Gary E.; Williams, Mike G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to devices and methods to quantitate bacteriophage. The method employs the use of a precipitable dye and a contrast-coloring dye to improve the visualization of viral plaques on a lawn of bacteria. A preferred device employs a water-hydratable powder a precipitable dye and a contrast-, coloring dye and the device includes a spacer sufficiently thick so that the cover over the device does not contact the bacteria growing in the substrate of the device.
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 August 26, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 26, 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.