Method for detecting the presence of contaminants in a reusable plastic food or beverage container
CA 1313241 C · Owner: Davis, James Edward · Inventors: Steichen, John Carl; Davis, James Edward; Craig, Alan Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a method for detecting whether contaminants are on or have migrated into the body of a plastic reusable food or beverage container. The invention uses a sensor attached to the inside of the container which changes; optical density when it is exposed to certain contaminants. The change in optical density is detected by illuminating the sensor with ultraviolet light and then measuring the effect that the sensor has on the ultraviolet light.
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
- Granted January 26, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 26, 2010.
- 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.