US2774928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead network for servo-mechanisms with a. c. carrier voltage
Assignee: Individual
•
Filing: 1952-08-26
•
Granted: 1956-12-18
•
Expires: 1972-08-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas D Johnson
- 👤 Martin G Sateren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:57
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1418
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2088654A
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US2409970A
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US2233415A
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US2446567A
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US2445773A
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US2546837A
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US2584954A
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US2632872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |