Patent US2788720A successfully refreshed from Google Patents.
US2788720A
Expired / Lapsed
US
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Method and apparatus for forming moisture-proof gussets
Assignee: ST Regis Paper Co
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Filing: 1955-11-04
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Granted: 1957-04-16
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Expires: 1975-11-04
Abstract
No abstract record available.
Inventors
- 👤 Randolph M Browning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:29
CPC Classifications
B; B31; B31B; B31B50/00; B31B70/00; B31B70/74; B31B70/79; B31B50/74; B31B50/742; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |