Patent US1554118A successfully refreshed from Google Patents.
US2648249A
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Frequency modulated photometer
Assignee: General Electric Co
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Filing: 1948-02-28
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Granted: 1953-08-11
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Expires: 1968-02-28
Abstract
No abstract record available.
Inventors
- 👤 Alfred H Canada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:54
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/314; G01J; G01J3/00; G01J3/28; G01J3/42; G01J3/433
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2166824A
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US2170435A
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US2339053A
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US2444560A
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US2437323A
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US2439373A
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US2462946A
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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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |