US2907937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital servo system
Assignee: International Business Machines Corp
•
Filing: 1957-12-26
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Granted: 1959-10-06
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Expires: 1977-12-26
Abstract
No abstract record available.
Inventors
- 👤 Donald H Apgar
- 👤 Elmer H Bosman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:31
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1436; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/39; H; H03; H03M; H03M1/00; H03M1/12; H03M1/48; H03M1/485; G05B2219/00; G05B2219/30; G05B2219/41; G05B2219/41105; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/300896; Y10T82/00; Y10T82/25; Y10T82/2502
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2840771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |