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US2808501A
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Apparatus and improvements for hot forming materials
Assignee: Lockheed Martin Corp
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Filing: 1955-11-25
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Granted: 1957-10-01
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Expires: 1975-11-25
Abstract
No abstract record available.
Inventors
- 👤 Kilpatrick Robert Hynds
- 👤 Stovall Frank Aiken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:53
CPC Classifications
B; B21; B21D; B21D11/00; B21D11/02; B21D25/00; B21D25/02; H; H05; H05B; H05B3/00; H05B3/0004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1112779A
Cited
US2443336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |