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Patent US2978976A successfully refreshed from Google Patents.
US2978976A
Expired / Lapsed
US
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Level control for press brakes and the like
Assignee: Cincinnati Shaper Co
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Filing: 1959-01-21
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Granted: 1961-04-11
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Expires: 1979-01-21
Abstract
No abstract record available.
Inventors
- 👤 Merrill W Hazelton
- 👤 Richard E Griesheimer
- 👤 Carl J Ostendorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:43
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/16; B30B15/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA554000A
Cited
US2271231A
Cited
US2309944A
Cited
US2353388A
Cited
US2558071A
Cited
US2484908A
Cited
US2761285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |