Patent US2949875A successfully refreshed from Google Patents.
US2949875A
Expired / Lapsed
US
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Apparatus for forming hollow sheet metal panels
Assignee: Olin Corp
•
Filing: 1954-07-22
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Granted: 1960-08-23
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Expires: 1974-07-22
Abstract
No abstract record available.
Inventors
- 👤 Richard F Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:52
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; B21D53/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1522051A
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GB523948A
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US2350541A
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US2662273A
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GB695640A
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US2756487A
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US2882588A
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US2779086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |