US2820937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital to analogue converter servosystem
Assignee: Individual
•
Filing: 1955-08-02
•
Granted: 1958-01-21
•
Expires: 1975-08-02
Abstract
No abstract record available.
Inventors
- 👤 Fogiel Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:11
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/48; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/300896; Y10T82/00; Y10T82/14; Y10T82/141; Y10T82/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2345281A
Cited
US2324221A
Cited
US2339976A
Cited
US2354413A
Cited
US2508881A
Cited
US2715703A
Cited
US2769125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |