US1750692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skeleton structure such as aircraft fuselage
Assignee: Individual
•
Filing: 1928-02-25
•
Granted: 1930-03-18
•
Expires: 1948-02-25
Abstract
No abstract record available.
Inventors
- 👤 Sigrist Frederick
- 👤 Camm Sydney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:59
CPC Classifications
B; B64; B64C; B64C1/00; B64C1/06; B64C2001/0054; B64C2001/0081; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/347; Y10T403/44
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1933-03-17 | 1933-09-16 | 1934-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-03-17 | 1937-09-16 | 1938-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-03-17 | 1941-09-16 | 1942-03-18 | $7700.00 | Window Closed / Lapsed |