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US2690531A
Expired / Lapsed
US
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Electromechanical integrator
Assignee: AMPATCO LAB CORP
•
Filing: 1952-03-22
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Granted: 1954-09-28
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Expires: 1972-03-22
Abstract
No abstract record available.
Inventors
- 👤 Kurt A Marggra
- 👤 Werner F Massmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:11
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/18; G06G7/188
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2383942A
Cited
US2591938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |