US3039030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital to analogue conversion servosystem
Assignee: International Business Machines Corp
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Filing: 1958-06-30
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Granted: 1962-06-12
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Expires: 1978-06-30
Abstract
No abstract record available.
Inventors
- 👤 Ralph J Weidner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:20
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/121; G05D3/122; H; H03; H03M; H03M1/00; H03M1/06; H03M1/0617; H03M1/0675; H03M1/069; H03M1/66; H03M1/68
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) | 1965-06-11 | 1965-12-11 | 1966-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-11 | 1969-12-11 | 1970-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-11 | 1973-12-11 | 1974-06-12 | $7700.00 | Window Closed / Lapsed |