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Patent US2990762A successfully refreshed from Google Patents.
US2990762A
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US
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Automatic control device
Assignee: Bell and Howell Co
•
Filing: 1957-03-04
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Granted: 1961-07-04
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Expires: 1977-03-04
Abstract
No abstract record available.
Inventors
- 👤 Harlan L Baumbach
- 👤 Howard M Little
- 👤 Wargo Lorand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:32
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/04; G03B27/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1463737A
Cited
US1891398A
Cited
US1933693A
Cited
US2061069A
Cited
US2475245A
Cited
US2753500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |