US1781723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of shaping hollow bodies
Assignee: PITTSBURGH METAL AIRPLANE Co
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Filing: 1930-01-28
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Granted: 1930-11-18
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Expires: 1950-01-28
Abstract
No abstract record available.
Inventors
- 👤 Harold E Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:03
CPC Classifications
B; B21; B21D; B21D53/00; B64; B64C; B64C3/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49622; Y10T29/49826; Y10T29/49892; Y10T29/49895; Y10T29/49901
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) | 1933-11-17 | 1934-05-19 | 1934-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-11-17 | 1938-05-19 | 1938-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-11-17 | 1942-05-19 | 1942-11-18 | $7700.00 | Window Closed / Lapsed |