Test kit for determining the presence of organic materials and method of utilizing same
CA 1258626 A · Owner: Environmental Diagnostics, Inc. · Inventors: Wie, Siong I.; Chung, Roy A.; Kelton, Arden A.;
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A test card incorporates a colorimetric indicator test to determine the presence of a minute amount of a specific substance in a liquid medium. The test card includes top and bottom sheets adhesively secured to an intermediate frame member which together, with the top and bottom sheets defines a filter chamber, having a flat filter therein which incorporates a test portion. The test portion of the filter has a binding substrate to which antibodies of the specific substance have been bound. This binding substrate is in communication with a test port. In the method of the invention a substance to be tested is administered through the test port and contains an unknown amount of antigen. After …
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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
- Granted August 22, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 22, 2006.
- 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.