US2431706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device responsive to the rate op
Assignee: —
•
Filing: —
•
Granted: 1947-12-02
•
Expires: 1964-12-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:43
CPC Classifications
—
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US752491A
Cited
FR430832A
Cited
US1509743A
Cited
US1959889A
Cited
US1936780A
Cited
US1998136A
Cited
FR752390A
Cited
US1935004A
Cited
US2191250A
Cited
US2126855A
Cited
US2293889A
Cited
US2208666A
Cited
US2283753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |