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Patent US2451572A successfully refreshed from Google Patents.
US2451572A
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Radiant energy measuring apparatus
Assignee: AT&T Inc
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Filing: 1945-12-27
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Granted: 1948-10-19
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Expires: 1965-12-27
Abstract
No abstract record available.
Inventors
- 👤 Hilbert R Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:52
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/12; G01J3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1948941A
Cited
US1926824A
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US1954204A
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US2166124A
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US2237193A
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US2314800A
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US2376311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |