US2462971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic circuit with dual pressure control
Assignee: New York Air Brake LLC
•
Filing: 1947-05-08
•
Granted: 1949-03-01
•
Expires: 1967-05-08
Abstract
No abstract record available.
Inventors
- 👤 Matthew W Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:03
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/26; F04B1/28; F04B49/00; F04B49/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1952-02-29 | 1952-08-30 | 1953-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-29 | 1956-08-30 | 1957-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-29 | 1960-08-30 | 1961-03-01 | $7700.00 | Window Closed / Lapsed |