Patent US3223597A successfully refreshed from Google Patents.
US3223597A
Expired / Lapsed
US
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Method and means for oxygen analysis of gases
Assignee: Individual
•
Filing: 1961-03-01
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Granted: 1965-12-14
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Expires: 1981-03-01
Abstract
No abstract record available.
Inventors
- 👤 Paul A Hersch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:05
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404; G01N1/00; G01N1/28; G01N1/38; G01N27/416; G01N27/42; G01N27/423; G01N2001/381; G01N33/00; G01N33/0004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN THE METHOD FOR DETECTING AND MEASURING SMALL AMOUNTS OF OXYGEN IN A GAS BY CONTACTING A STREAM OF SAID GAS WITH A CATHODE SEPARATED FROM A CONSUMABLE ANODE BY A POROUS, ELECTROLYTE-CONTAINING DIAPHRAGM AND MEASURING THE CURRENT ACROSS SAID ANODE AND CATHODE, SAID ANODE BEING INCAPABLE OF EVOLVING HYDROGEN AT SAID CATHODE WHEN CIRCUITED WITH SAID CATHODE, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS SAID CATHODE A POROUS, NONRETICULATED, ELECTRICALLY CONDUCTING SHEET IN WHICH THE PORES ARE PARTIALLY FILLED WITH AQUEOUS ELECTROLYTE, SAID CATHODE BEING SELECTED FROM THE GROUP CONSISTING OF SILVER, GOLD, PLATINUM, COPPER, IRIDIUM AND CARBON.
Claim 2
Dependent Claim
98 words
IN THE METHOD FOR DETECTING AND MEASURING SMALL AMOUNTS OF OXYGEN IN A GAS BY CONTACTING A STREAM OF SAID GAS WITH A CATHODE SEPARATED FROM A CONSUMABLE ANODE BY A POROUS, ELECTROLYTE-CONTAINING DIAPHRAGM AND MEASURING THE CURRENT ACROSS SAID ANODE AND CATHODE, SAID ANODE BEING INCAPABLE OF EVOLVING HYDROGEN AT SAID CATHODE WHEN CIRCUITED WITH SAID CATHODE, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS SAID CATHODE A POROUS, NONRETICULATED, ELECTRICALLY CONDUCTING SHEET IN WHICH THE PORES ARE PARTIALLY FILLED WITH AQUEOUS ELECTROLYTE, SAID CATHODE BEING SELECTED FROM THE GROUP CONSISTING OF SILVER, GOLD, PLATINUM, COPPER, IRIDIUM AND CARBON.
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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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |