Leak-proof box
CA 1054988 A · Owner: Crown Zellerbach Corporation · Inventors: Stollberg, Ray H.; Leakey, Joseph W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A leak-proof box formed of three individual blanks having cooperating glue flaps secured at the corners of the box and sealer flaps which provide leak-proof seals at the upper box corners and along the upper ends of the box when a top closure panel is secured into position.
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 May 22, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 22, 1996.
- 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.