US2474929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic valve and switch for hydraulic brakes
Assignee: Individual
•
Filing: 1947-05-08
•
Granted: 1949-07-05
•
Expires: 1967-05-08
Abstract
No abstract record available.
Inventors
- 👤 Boler William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:09
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/28; F; F16; F16K; F16K17/00; F16K17/20; F16K17/22; F16K17/24; F16K17/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US684893A
Cited
US1280222A
Cited
US1659890A
Cited
US1951882A
Cited
US2087386A
Cited
US2015731A
Cited
US2085173A
Cited
US2161441A
Cited
US2239348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-04 | 1953-01-03 | 1953-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-04 | 1957-01-03 | 1957-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-04 | 1961-01-03 | 1961-07-05 | $7700.00 | Window Closed / Lapsed |