US2582358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing stiffened skin panel
Assignee: Northrop Grumman Corp
•
Filing: 1948-06-08
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Granted: 1952-01-15
•
Expires: 1968-06-08
Abstract
No abstract record available.
Inventors
- 👤 Schoellerman Alvin Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:08
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; B21D53/045; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T29/49805
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1685388A
Cited
US1712085A
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US1709865A
Cited
US2234839A
Cited
US2244475A
Cited
US2294137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |