US1423987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System or method of feeding combustion engines for airships
Assignee: Individual
•
Filing: 1919-06-03
•
Granted: 1922-07-25
•
Expires: 1939-06-03
Abstract
No abstract record available.
Inventors
- 👤 Boerner Arno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:57
CPC Classifications
B; B64; B64B; B64B1/00; B64B1/58
Claims Analysis
Total Claims: 0
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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) | 1925-07-24 | 1926-01-23 | 1926-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-07-24 | 1930-01-23 | 1930-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-07-24 | 1934-01-23 | 1934-07-25 | $7700.00 | Window Closed / Lapsed |