Foldable plastic bottle, mold form for its manufacture, and method of reducing its volume, when empty
CA 2021398 C · Owner: Duering, Walter · Inventors: Duering, Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The bottle is made of thin-walled plastic produced by a blow-molding process; a bottom part (3) is pre-formed with an inwardly extending, in cross section essentially V-shaped folded part (13) which defines an elongated inner bottom fold line (8). The inner fold line (8) merges smoothly with body fold lines (15, 15a, 15b) extending longitudinally of the bottle. The inner bottom fold line (8) and the longitudinal fold line are in a single plane, which plane is transverse to the seam or junction lines (9) formed by molding the bottle in a two-part mold. The cross section of the bottle may be circular rectangular, or hexagonal, and it is unitary with a pouring spout which extends, preferably …
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 July 18, 1990 and granted September 6, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 18, 2012.
- 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.