US3439585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air brake and operator therefor
Assignee: Individual
•
Filing: 1966-09-12
•
Granted: 1969-04-22
•
Expires: 1986-09-12
Abstract
No abstract record available.
Inventors
- 👤 Dan B Herrera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:52
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/08; B60T17/085; B60T17/086; B60T17/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US274715A
Cited
US2848980A
Cited
US2373259A
Cited
US2640368A
Cited
US3282169A
Cited
US3244079A
Cited
US3291004A
Cited
US3331291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |