Patent US2652904A successfully refreshed from Google Patents.
US2652904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor and trailer brake system
Assignee: ZF Active Safety US Inc
•
Filing: 1948-01-12
•
Granted: 1953-09-22
•
Expires: 1968-01-12
Abstract
No abstract record available.
Inventors
- 👤 Owen M Whitten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:56
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/58; B60T13/581
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2062500A
Cited
GB512436A
Cited
US2161642A
Cited
US2182047A
Cited
US2275255A
Cited
US2352001A
Cited
US2305638A
Cited
US2429194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |