Dispensing closure structures
CA 1094020 A · Owner: Polytop Corporation · Inventors: Gryncewicz, Benjamin; Wilson, Woodrow S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
It is known to manufacture closure structures so that each of such structures has a cap part including two spaced, aligned bearings and a movable part extending between the bearings and including trunnions fitting within the bearings. At least one of the parts of such closure structures is formed of a material which is sufficiently resilient so that the trunnions may be snapped into the bearings during the assembly of the closure structure. Such a closure structure may be improved so as to reduce damage to one or both of the parts during the manufacture of such a closure structure by shaping the trunnions and the bearings so that they both have shapes of surfaces of revolution which …
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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 20, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 20, 1998.
- 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.