US3451663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating device for aircraft engines
Assignee: PETER J HILLE
•
Filing: 1968-03-14
•
Granted: 1969-06-24
•
Expires: 1988-03-14
Abstract
No abstract record available.
Inventors
- 👤 Peter J Hille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:27
CPC Classifications
B; B64; B64F; B64F5/00; B64F5/20; B64F5/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1862114A
Cited
US2295177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |