US2918004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated jet propulsion unit
Assignee: Individual
•
Filing: 1953-10-20
•
Granted: 1959-12-22
•
Expires: 1973-10-20
Abstract
No abstract record available.
Inventors
- 👤 Denovan Alexander Ewi Crawford
- 👤 Hodgson Dennis James
- 👤 Kremer Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:51
CPC Classifications
F; F42; F42B; F42B15/00; F02; F02K; F02K9/00; F02K9/08; F02K9/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |