US3438875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming reference electrodes
Assignee: Beckman Coulter Inc
•
Filing: 1966-04-14
•
Granted: 1969-04-15
•
Expires: 1986-04-14
Abstract
No abstract record available.
Inventors
- 👤 Hideo Watanabe
- 👤 John N Harman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:03
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/301
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1598018A
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US3006821A
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US2521082A
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US2651612A
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US2977293A
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US2928775A
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US2998371A
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US3169913A
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US3272731A
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US3315270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |