Patent US2957980A successfully refreshed from Google Patents.
US2957980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic integrators and automatic controllers
Assignee: Individual
•
Filing: 1955-10-04
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Granted: 1960-10-25
•
Expires: 1975-10-04
Abstract
No abstract record available.
Inventors
- 👤 Steghart Fritz Ludwig Felix
- 👤 Kershaw Peter Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:00
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/18; G06G7/184; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2622231A
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US2728041A
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US2708258A
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US2637820A
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US2687474A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |