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Patent US2642861A successfully refreshed from Google Patents.
US2642861A
Expired / Lapsed
US
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Accessory for files
Assignee: Individual
•
Filing: 1951-01-30
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Granted: 1953-06-23
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Expires: 1971-01-30
Abstract
No abstract record available.
Inventors
- 👤 Tvedt Bernhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:48
CPC Classifications
B; B42; B42F; B42F17/00; B42F17/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1416287A
Cited
US1524348A
Cited
US1901365A
Cited
US1756866A
Cited
US1836234A
Cited
US2149821A
Cited
US2479118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |