US2483941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braking system
Assignee: STEEL PRODUCTS ENG CO
•
Filing: 1945-02-19
•
Granted: 1949-10-04
•
Expires: 1965-02-19
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:45
CPC Classifications
F; F01; F01L; F01L13/00; F01L2760/00; F01L2760/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1829780A
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US1894033A
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US2031625A
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US2141428A
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US2215058A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-03 | 1953-04-04 | 1953-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-03 | 1957-04-04 | 1957-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-03 | 1961-04-04 | 1961-10-04 | $7700.00 | Window Closed / Lapsed |