US2430780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording instrument
Assignee: RCA Corp
•
Filing: 1942-12-19
•
Granted: 1947-11-11
•
Expires: 1962-12-19
Abstract
No abstract record available.
Inventors
- 👤 Harold O Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:10
CPC Classifications
G; G01; G01D; G01D13/00; G01D13/22; G01D13/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1638103A
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FR764846A
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Cited
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US2164114A
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US2228883A
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US2348711A
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US2351081A
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 |