Patent US2517121A successfully refreshed from Google Patents.
US2517121A
Expired / Lapsed
US
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Automatic spectrophotometer
Assignee: Motors Liquidation Co
•
Filing: 1947-06-03
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Granted: 1950-08-01
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Expires: 1967-06-03
Abstract
No abstract record available.
Inventors
- 👤 Max D Liston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:18
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/30; G01J3/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1894132A
Cited
US2063140A
Cited
US2176013A
Cited
US2170435A
Cited
US2218357A
Cited
US2314800A
Cited
US2404064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-31 | 1954-01-30 | 1954-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-31 | 1958-01-30 | 1958-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-31 | 1962-01-30 | 1962-08-01 | $7700.00 | Window Closed / Lapsed |