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Patent US2430503A successfully refreshed from Google Patents.
US2430503A
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US
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Indicating, recording, or control apparatus
Assignee: Negretti and Zambra Ltd
•
Filing: 1944-10-02
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Granted: 1947-11-11
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Expires: 1964-10-02
Abstract
No abstract record available.
Inventors
- 👤 Greening Emil Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:39
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2132338A
Cited
US893176A
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US1721800A
Cited
US1798932A
Cited
US1953406A
Cited
US2244564A
Cited
US2211317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-10 | 1951-05-12 | 1951-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-10 | 1955-05-12 | 1955-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-10 | 1959-05-12 | 1959-11-11 | $7700.00 | Window Closed / Lapsed |