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Patent US2439474A successfully refreshed from Google Patents.
US2439474A
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Brake pressure responsive signal system
Assignee: Individual
•
Filing: 1946-06-10
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Granted: 1948-04-13
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Expires: 1966-06-10
Abstract
No abstract record available.
Inventors
- 👤 Jeremiah D Kennelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:12
CPC Classifications
B; B60; B60T; B60T7/00; B60T7/12; B60T7/128; B61; B61L; B61L1/00; B61L1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-13 | 1951-10-13 | 1952-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-13 | 1955-10-13 | 1956-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-13 | 1959-10-13 | 1960-04-13 | $7700.00 | Window Closed / Lapsed |