Patent US3619443A successfully refreshed from Google Patents.
US3619443A
Expired / Lapsed
US
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Method for the production of nestable containers
Assignee: Monsanto Chemicals Ltd
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Filing: 1968-08-05
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Granted: 1971-11-09
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Expires: 1988-08-05
Abstract
Abstract A method for altering the configuration of a series of containers produced in a mold such that the containers can be nested together without sticking. A first container is made by differential pressure forming a thermoplastic sheet in a mold having means for forming stacking lugs in the surface of the container. The means forming the stacking lugs are then automatically altered in position so as to present a mold having a different configuration at the surface where the stacking lugs are formed and a second container is formed in the mold. The containers are then nested and the stacking lugs of different configuration prevent sticking together of the containers.
Inventors
- 👤 Peter Blandford Feldman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:33
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/30; B29C51/34; B29C51/346; B29C33/00; B29C33/30; B29C33/308
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
15 words
A process according to claim 1 in which the thermoplastic sheet is biaxially oriented polystyrene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |