Patent US2471012A successfully refreshed from Google Patents.
US2471012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel saving device
Assignee: Individual
•
Filing: 1944-09-14
•
Granted: 1949-05-24
•
Expires: 1964-09-14
Abstract
No abstract record available.
Inventors
- 👤 Spaw Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:40
CPC Classifications
F; F02; F02M; F02M25/00; F02M25/022; F02M25/025; F02M25/028; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1541684A
Cited
US1542999A
Cited
US1562559A
Cited
US1483658A
Cited
US1542301A
Cited
US1528305A
Cited
US1582089A
Cited
US1663163A
Cited
US1738904A
Cited
US2052608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-23 | 1952-11-22 | 1953-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-23 | 1956-11-22 | 1957-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-23 | 1960-11-22 | 1961-05-24 | $7700.00 | Window Closed / Lapsed |