Patent FR2573053A1 successfully refreshed from Google Patents.
US2515762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator for spectrophotometer
Assignee: —
•
Filing: —
•
Granted: 1950-07-18
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Expires: 1967-07-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:37
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/55; G01J; G01J1/00; G01J1/02; G01J1/04; G01J1/08; G01J1/10; G01J1/20; G01J1/42; G01J1/44; G01N21/552
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1565488A
Cited
US1932337A
Cited
US2411741A
Cited
US2361549A
Cited
US2388727A
Cited
US2442910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |