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Patent US2879933A successfully refreshed from Google Patents.
US2879933A
Expired / Lapsed
US
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Bottom closures for lined cartons
Assignee: Bergstein Packaging Trust
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Filing: 1953-03-18
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Granted: 1959-03-31
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Expires: 1973-03-18
Abstract
No abstract record available.
Inventors
- 👤 Frank D Bergstein
- 👤 Robert W Nerenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:57
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/56; B65D5/60; B65D5/603; B65D5/606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2297375A
Cited
US2367477A
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US2407802A
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US2377533A
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US2429538A
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US2428396A
Cited
US2516820A
Cited
GB620354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |