Patent US2997147A successfully refreshed from Google Patents.
US2997147A
Expired / Lapsed
US
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Dual-rate instrument
Assignee: Siemens Schuckertwerke AG
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Filing: 1958-06-05
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Granted: 1961-08-22
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Expires: 1978-06-05
Abstract
No abstract record available.
Inventors
- 👤 Bilz Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:29
CPC Classifications
G; G06; G06M; G06M3/00; G06M3/08; F; F16; F16H; F16H37/00; G01; G01R; G01R11/00; G01R11/56; G05; G05G; G05G11/00; F16H2700/00; F16H2700/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US817916A
Cited
US1440911A
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US1373786A
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US1557944A
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US1926190A
Cited
US2084396A
Cited
US2462846A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |