US3478555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-roll machine for rolling sheet metal
Assignee: Kaufmann Tool & Eng Corp
•
Filing: 1966-12-15
•
Granted: 1969-11-18
•
Expires: 1986-12-15
Abstract
No abstract record available.
Inventors
- 👤 Howard S Achler
- 👤 Harold Kaufmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:48
CPC Classifications
B; B21; B21D; B21D5/00; B21D5/14; B21D5/146
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2454282A
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US2292851A
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US2287768A
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US2546200A
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US2783719A
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US3042995A
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US3344493A
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US3351001A
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US3371513A
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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) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |