Patent US2990473A successfully refreshed from Google Patents.
US2990473A
Expired / Lapsed
US
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Method for recording, detecting and measuring radiation and for recording and recalling data
Assignee: Research Corp
•
Filing: 1955-05-04
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Granted: 1961-06-27
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Expires: 1975-05-04
Abstract
No abstract record available.
Inventors
- 👤 Kallmann Hartmut Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:29
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; G; G01; G01R; G01R1/00; G01R1/30; G01T; G01T1/00; G01T1/02; G01T1/29; G01T1/2914; G01T1/2921; G11; G11C; G11C13/00; G11C13/04; G11C13/048
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) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |