Patent US2701408A successfully refreshed from Google Patents.
US2701408A
Expired / Lapsed
US
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Method of cold forming sheets
Assignee: Lockheed Martin Corp
•
Filing: 1951-11-19
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Granted: 1955-02-08
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Expires: 1971-11-19
Abstract
No abstract record available.
Inventors
- 👤 James C Borger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:04
CPC Classifications
B; B21; B21D; B21D31/00; B21D31/06; Y; Y10; Y10S; Y10S82/00; Y10S82/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1605730A
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US1907198A
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US1985332A
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US1946340A
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US2132311A
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US2239044A
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US2234850A
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US2252823A
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US2338591A
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US2458686A
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US2489877A
Cited
US2520566A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-07 | 1958-08-09 | 1959-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-07 | 1962-08-09 | 1963-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-07 | 1966-08-09 | 1967-02-08 | $7700.00 | Window Closed / Lapsed |