Patent US399540A successfully refreshed from Google Patents.
US2605671A
Expired / Lapsed
US
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Spectrophotometer
Assignee: General Electric Co
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Filing: 1948-02-28
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Granted: 1952-08-05
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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
2026-10-22 21:03
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1746525A
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US1964365A
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US2157389A
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US2314800A
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US2406318A
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US2458973A
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US2444560A
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US2437323A
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GB584506A
Cited
US2439373A
Cited
US2462946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-05 | 1956-02-04 | 1956-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-05 | 1960-02-04 | 1960-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-05 | 1964-02-04 | 1964-08-05 | $7700.00 | Window Closed / Lapsed |