US2611066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric head bolt heater for internal-combustion engines
Assignee: Individual
•
Filing: 1951-01-12
•
Granted: 1952-09-16
•
Expires: 1971-01-12
Abstract
No abstract record available.
Inventors
- 👤 Andrew L Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:04
CPC Classifications
F; F23; F23Q; F23Q7/00; F23Q7/001; H; H05; H05B; H05B3/00; H05B3/02; H05B3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191314562A
Cited
US1455246A
Cited
US1702326A
Cited
US2176601A
Cited
US2457028A
Cited
US2551770A
Cited
US2487326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |