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Patent US2657963A successfully refreshed from Google Patents.
US2657963A
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US
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Folding leg structure
Assignee: Seng Co
•
Filing: 1951-02-06
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Granted: 1953-11-03
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Expires: 1971-02-06
Abstract
No abstract record available.
Inventors
- 👤 Fox Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:20
CPC Classifications
A; A47; A47B; A47B3/00; A47B3/08; A47B3/091; A47B3/0911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1291304A
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US1933882A
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US2075778A
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US2178248A
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US2202624A
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US2374670A
Cited
US2495965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |