Patent US2948839A successfully refreshed from Google Patents.
US2948839A
Expired / Lapsed
US
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Motor control for positioning device
Assignee: CONVAL CORP
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Filing: 1956-04-09
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Granted: 1960-08-09
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Expires: 1976-04-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Paul E Smith
- 👤 Hans A Dudler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:29
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; B; B23; B23Q; B23Q1/00; B23Q1/25; F; F16; F16K; F16K31/00; F16K31/02; F16K31/04; F16K31/046; B23Q2701/00; B23Q2701/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR793622A
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US2434919A
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US2445806A
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US2509295A
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US2517373A
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US2755421A
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US2600568A
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US2679022A
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US2753499A
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US2743402A
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US2830249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |