Patent US3666650A successfully refreshed from Google Patents.
US3666650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid sensor cap assembly
Assignee: MDA Scientific Inc
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Filing: 1970-05-06
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Granted: 1972-05-30
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Expires: 1990-05-06
Abstract
Abstract Membrane type polarographic oxygen sensors are constructed to be uniformly rechargeable with electrolyte by introducing a selected quantity of electrolyte into a tubular cap for reception at the electrode side of a membrane in the cap; the cap is then assembled into the sensor body in such manner as to bring the electrolyte into contact with the cathode tip, and into a predetermined volume space adjacent the tip for current carrying purposes.
Inventors
- 👤 Thaddeus M Doniguian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:38
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
The combination of claim 1 wherein said membrane is an oxygen passing membrane.
Claim 2
Dependent Claim
40 words
The combination of claim 2 including a stop on the ring within the cap presented to engage said sensor structure and limit said assembly of the cap thereto when the membrane is brought into force transmitting relation with the shoulder.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |