US2437139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic speed control apparatus
Assignee: HPM Development Corp
•
Filing: 1944-02-23
•
Granted: 1948-03-02
•
Expires: 1964-02-23
Abstract
No abstract record available.
Inventors
- 👤 Warren R Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:29
CPC Classifications
G; G05; G05D; G05D13/00; F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/44; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86558; Y10T137/86566
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1466642A
Cited
GB201235A
Cited
GB232349A
Cited
CH121879A
Cited
US1694704A
Cited
US1939113A
Cited
US2105824A
Cited
US2320727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-02 | 1951-09-01 | 1952-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-02 | 1955-09-01 | 1956-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-02 | 1959-09-01 | 1960-03-02 | $7700.00 | Window Closed / Lapsed |