US2557259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treadle bearing
Assignee: Singer Co
•
Filing: 1945-12-08
•
Granted: 1951-06-19
•
Expires: 1965-12-08
Abstract
No abstract record available.
Inventors
- 👤 Daniel H Chason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:23
CPC Classifications
D; D05; D05B; D05B69/00; D05B69/14; D05B69/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US288489A
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US328088A
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US1440559A
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US996301A
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US1275439A
Cited
FR538377A
Cited
US1799783A
Cited
US2136819A
Cited
US2277384A
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US2362160A
Cited
US2418219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |