Patent US2613787A successfully refreshed from Google Patents.
US2613787A
Expired / Lapsed
US
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Two-hand safety control for power machinery
Assignee: National Pneumatic Co Inc
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Filing: 1948-08-26
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Granted: 1952-10-14
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Expires: 1968-08-26
Abstract
No abstract record available.
Inventors
- 👤 Charles W Ledig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:22
CPC Classifications
F; F16; F16P; F16P3/00; F16P3/18; F16P3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1526025A
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US1711079A
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US1829184A
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US1929484A
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US2267415A
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US2423482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-14 | 1956-04-14 | 1956-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-14 | 1960-04-14 | 1960-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-14 | 1964-04-14 | 1964-10-14 | $7700.00 | Window Closed / Lapsed |