Patent US2450156A successfully refreshed from Google Patents.
Patent US1873569A successfully refreshed from Google Patents.
US1873569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine valve
Assignee: Ford Motor Co
•
Filing: 1930-07-10
•
Granted: 1932-08-23
•
Expires: 1950-07-10
Abstract
No abstract record available.
Inventors
- 👤 Ford Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:18
CPC Classifications
F; F01; F01L; F01L3/00; F02; F02B; F02B2275/00; F02B2275/22; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49298; Y10T29/49314
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-08-23 | 1936-02-22 | 1936-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-08-23 | 1940-02-22 | 1940-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-08-23 | 1944-02-22 | 1944-08-23 | $7700.00 | Window Closed / Lapsed |