US3535902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for straightening sheet materials
Assignee: Fried Krupp AG Hoesch Krupp
•
Filing: 1968-02-29
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Granted: 1970-10-27
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Expires: 1988-02-29
Abstract
No abstract record available.
Inventors
- 👤 Theodor Sevenich
- 👤 Peter Zens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:59
CPC Classifications
B; B21; B21D; B21D1/00; B21D1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1584499A
Cited
US1854021A
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US2240548A
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US2337047A
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US2348539A
Cited
US2470235A
Cited
US2692003A
Cited
US2854056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |