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US3539455A
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Membrane polarographic electrode system and method with electrochemical compensation
Assignee: LELAND C CLARK JR
•
Filing: 1965-10-08
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Granted: 1970-11-10
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Expires: 1985-10-08
Abstract
No abstract record available.
Inventors
- 👤 Leland C Clark Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:53
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/001; C12Q1/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3208926A
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US3294652A
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US3275534A
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US3296113A
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US3334039A
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US3479255A
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US3367849A
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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) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |