US2840771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positioning servomechanism
Assignee: Pratt and Whitney Co Inc
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Filing: 1955-02-09
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Granted: 1958-06-24
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Expires: 1975-02-09
Abstract
No abstract record available.
Inventors
- 👤 Lawrence J Kamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:50
CPC Classifications
H; H03; H03M; H03M1/00; B; B23; B23Q; B23Q17/00; G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/33; G05B19/35; G05B19/351; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1436; B23Q2717/00; B23Q2717/003; G05B2219/00; G05B2219/30; G05B2219/33; G05B2219/33268; G05B2219/37; G05B2219/37462; G05B2219/41; G05B2219/41081; G05B2219/41105; H03M1/12; H03M1/22; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/300896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |