Method of detecting defective portion of sealing
CA 1080555 A · Owner: Nagatanien Honpo Co. Ltd. · Inventors: Yoshimura, Tetsuya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of detecting the defective portion of sealing comprising injecting into a moisture-tight container or package having a sealed portion a detection liquor consisting essentially of a colored liquid organic compound small in surface tension and high in permeability into small clearances. The defective portion of sealing is readily detected by exudation of the detection liquor outside the moisture-tight container.
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 July 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 1, 1997.
- 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.