US2630736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrophotometer
Assignee: American Optical Corp
•
Filing: 1947-09-16
•
Granted: 1953-03-10
•
Expires: 1967-09-16
Abstract
No abstract record available.
Inventors
- 👤 Richard C Beitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:49
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE19816E
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US2206244A
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FR873671A
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US2046958A
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US2193606A
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US2411741A
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US2330877A
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US2406318A
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US2444560A
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US2437323A
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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) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |