US2553906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Bristol Steel & Iron Works Inc
•
Filing: 1948-08-30
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Granted: 1951-05-22
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Expires: 1968-08-30
Abstract
No abstract record available.
Inventors
- 👤 Robert O Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:46
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/09; G08G1/095
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1363566A
Cited
US1366107A
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FR541156A
Cited
US1638625A
Cited
US1778717A
Cited
US1989237A
Cited
US2006675A
Cited
US2228835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |