US2513537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric integrator using a motor with velocity feedback
Assignee: Individual
•
Filing: 1947-08-07
•
Granted: 1950-07-04
•
Expires: 1967-08-07
Abstract
No abstract record available.
Inventors
- 👤 Williams Frederic Calland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:43
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/18; G06G7/188; Y; Y10; Y10S; Y10S388/00; Y10S388/90; Y10S388/906
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) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |