US3239444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen sensing polarographic cell
Assignee: Honeywell Inc
•
Filing: 1962-02-08
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Granted: 1966-03-08
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Expires: 1982-02-08
Abstract
No abstract record available.
Inventors
- 👤 Jimmie L Heldenbrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:53
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
IN COMBINATIN: A COVER OF INVERTED CUP SHAPE HAVING A CENTRAL APERTURE; A BASE PLATE; MEANS SEALINGLY FASTENING SAID BASE PLATE TO SAID COVER; A HOLLOW FIRST ELECTRODE OF LARGE SURFACE AREA; MEANS RESILIENTLY SUPPORTING SAID ELECTRODE ON SAID BASE PLATE WITHIN SAID COVER; A CAP MEMBER OF INSULATING MATERIAL SUPPORTED ON SAID ELECTRODE AND HAVING A CENTRL BORE ALIGNED WITH SAID APERTURE; AN ELECTRICALLY CONDUCINT ANNULUS HAVING A CONICAL ELECTRODE-ENGAGING SURFACE ON SAID CAP MEMBER SURROUNDING SAID BORE; A FLEXIBLE CLOSURE MEMBER ON SAID CAP MEMBER INCLUDING A FINELY APERTURED INNER LAYER OF MATERIAL CAPABLE OF ACTING AS A SECOND ELECTRODE AND OF VERY MUCH SMALLER AREA THAN SAID FIRST ELECTRODE, AND AN OUTER LAYER SELECTIVELY PERMEABLE BY OXYGEN BUT SUBSTANTIALLY IMPERMEABLE BY AN ELECTROLYTE; A RESILIENT SEALING RING BETWEEN SAID COVER AND SAID CAP MEMBER PRESSING SAID CLOSURE MEMBER AGAINST SAID SURFACE TO CLOSE BOTH SAID APERTURE AND SAID BORE, AND TO INSURE ELECTRICAL CONNECTION
Claim 2
Dependent Claim
157 words
IN COMBINATIN: A COVER OF INVERTED CUP SHAPE HAVING A CENTRAL APERTURE; A BASE PLATE; MEANS SEALINGLY FASTENING SAID BASE PLATE TO SAID COVER; A HOLLOW FIRST ELECTRODE OF LARGE SURFACE AREA; MEANS RESILIENTLY SUPPORTING SAID ELECTRODE ON SAID BASE PLATE WITHIN SAID COVER; A CAP MEMBER OF INSULATING MATERIAL SUPPORTED ON SAID ELECTRODE AND HAVING A CENTRL BORE ALIGNED WITH SAID APERTURE; AN ELECTRICALLY CONDUCINT ANNULUS HAVING A CONICAL ELECTRODE-ENGAGING SURFACE ON SAID CAP MEMBER SURROUNDING SAID BORE; A FLEXIBLE CLOSURE MEMBER ON SAID CAP MEMBER INCLUDING A FINELY APERTURED INNER LAYER OF MATERIAL CAPABLE OF ACTING AS A SECOND ELECTRODE AND OF VERY MUCH SMALLER AREA THAN SAID FIRST ELECTRODE, AND AN OUTER LAYER SELECTIVELY PERMEABLE BY OXYGEN BUT SUBSTANTIALLY IMPERMEABLE BY AN ELECTROLYTE; A RESILIENT SEALING RING BETWEEN SAID COVER AND SAID CAP MEMBER PRESSING SAID CLOSURE MEMBER AGAINST SAID SURFACE TO CLOSE BOTH SAID APERTURE AND SAID BORE, AND TO INSURE ELECTRICAL CONNECTION
References Cited (Backward Citations)
US2371123A
Cited
US756328A
Cited
US1251302A
Cited
US1433017A
Cited
US2116509A
Cited
US2428055A
Cited
US2816067A
Cited
US2939827A
Cited
US2913386A
Cited
US2807577A
Cited
US3000805A
Cited
US3038848A
Cited
DE1117962B
Cited
US3116170A
Cited
US3070539A
Cited
US3113048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |