Patent US3409326A successfully refreshed from Google Patents.
Patent US2722640A successfully refreshed from Google Patents.
US2722640A
Expired / Lapsed
US
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Electronic control device for comparing one value with a normal value or range of values
Assignee: Exact Weight Scale Co
•
Filing: 1951-03-29
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Granted: 1955-11-01
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Expires: 1971-03-29
Abstract
No abstract record available.
Inventors
- 👤 Roger L Merrill
- 👤 Hecox William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:55
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |