US2446428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing indications of movement of an element
Assignee: RCA Corp
•
Filing: 1944-11-03
•
Granted: 1948-08-03
•
Expires: 1964-11-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederic D Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:33
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1848490A
Cited
US1718497A
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US1912213A
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US1849870A
Cited
US1809683A
Cited
US2081684A
Cited
US2144215A
Cited
US2395368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-03 | 1952-02-02 | 1952-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-03 | 1956-02-02 | 1956-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-03 | 1960-02-02 | 1960-08-03 | $7700.00 | Window Closed / Lapsed |