Patent US2481357A successfully refreshed from Google Patents.
US2481357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal
Assignee: Douglas Aircraft Co Inc
•
Filing: 1945-10-31
•
Granted: 1949-09-06
•
Expires: 1965-10-31
Abstract
No abstract record available.
Inventors
- 👤 Paul L Smith
- 👤 Jr Lewis E Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:45
CPC Classifications
B; B64; B64C; B64C1/00; B64C1/14; B64C1/1476; B64C1/1484; B64D; B64D37/00; B64D37/02; F; F16; F16B; F16B2200/00; F16B2200/60; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49893
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US392931A
Cited
US715397A
Cited
US1754051A
Cited
US2130948A
Cited
US2252554A
Cited
US2349290A
Cited
US2402253A
Cited
US2405038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-05 | 1953-03-07 | 1953-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-05 | 1957-03-07 | 1957-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-05 | 1961-03-07 | 1961-09-06 | $7700.00 | Window Closed / Lapsed |