US2886770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarographic method and apparatus
Assignee: Standard Oil Co
•
Filing: 1954-07-07
•
Granted: 1959-05-12
•
Expires: 1974-07-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Warren Jackson
- 👤 Philip J Elving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:19
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2232211A
Cited
US2367746A
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US2704826A
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US2659234A
Cited
US2659047A
Cited
US2674719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |