Instrument sterilization life-span indicator
CA 2197194 C · Owner: Grignol, George E. · Inventors: Malchesky, Paul S.; Grignol, George E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pigment such as crystal violet is iatpregnated in or otherwise affixed to a translucent plastic, or porous member (14 22). The color change material changes at least one of opacity or color, with repeated exposure to a fluid sterilant such as an oxidant solution. A , label (10 24) is mounted, behind the translucent plastic material and carries an indicia (12 26). With , repeated sterilizafions, of the instrument the color change material becomes progressively more translucent, allowing the, indicia to be read through the translucent plastic material. When the indicia becomes visible, such as, after about 7 sterilization cycles in Figure 3 the user is warned to , discontinue use of the …
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 16, 1995 and granted July 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 16, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 2017.
- 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.