US2773020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal ion determination by direct reading system
Assignee: Standard Oil Co
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Filing: 1951-05-31
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Granted: 1956-12-04
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Expires: 1971-05-31
Abstract
No abstract record available.
Inventors
- 👤 Offutt Elmer Bradley
- 👤 Leonard V Sorg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:57
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/48; G01N33/00; G01N33/18; G01N33/1813
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |