Patent US2901327A successfully refreshed from Google Patents.
US2901327A
Expired / Lapsed
US
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Method for measuring traces of dissolved oxygen
Assignee: Beckman Coulter Inc
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Filing: 1955-05-23
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Granted: 1959-08-25
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Expires: 1975-05-23
Abstract
No abstract record available.
Inventors
- 👤 Louis C Thayer
- 👤 Jr Michael Czuha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:04
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/021; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/207497; Y10T436/209163; Y10T436/25; Y10T436/25125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A PROCESS FOR MEASURING TRACES OF DISSOLVED OXYGEN IN A LIQUID THAT PER SE HAS VERY LOW ELECTRICAL CONDUCTANCE, WHICH COMPRISES: CONVERTING THE IONS IN SAID LIQUID TO A PREDETERMINED SPECIES; MEASURING THE CONDUCTANCE OF SAID LIQUID; REACTING NITRIC OXIDE WITH A BASIC REAGENT TO REMOVE ALL NITROGEN DIOXIDE THEREFROM; REACTING THE DISSOLVED OXYGEN IN SAID LIQUID WITH SAID REACTED NITRIC OXIDE SO AS TO FORM ACID, WITH SAID NITRIC OXIDE NOT BEIN IONIZABLE IN SAID LIQUID PER SE WHILE BEING REACTABLE WITH SAID DISSOLVED OXYGEN TO CHANGE THE CONDUCTANCE OF SAID LIQUID, WITH SAID PREDETERMINED ION SPECIES NOT BEING REACTABLE WITH SAID NITRIC OXIDE; AND MEASURING THE CONDUCTANCE OF SAID LIQUID SO THAT THE OXYGEN CONTENT OF SAID LIQUID MAY BE DETERMINED BY THE CHANGE IN CONDUCTANCE THEREOF.
Claim 2
Dependent Claim
129 words
A PROCESS FOR MEASURING TRACES OF DISSOLVED OXYGEN IN A LIQUID THAT PER SE HAS VERY LOW ELECTRICAL CONDUCTANCE, WHICH COMPRISES: CONVERTING THE IONS IN SAID LIQUID TO A PREDETERMINED SPECIES; MEASURING THE CONDUCTANCE OF SAID LIQUID; REACTING NITRIC OXIDE WITH A BASIC REAGENT TO REMOVE ALL NITROGEN DIOXIDE THEREFROM; REACTING THE DISSOLVED OXYGEN IN SAID LIQUID WITH SAID REACTED NITRIC OXIDE SO AS TO FORM ACID, WITH SAID NITRIC OXIDE NOT BEIN IONIZABLE IN SAID LIQUID PER SE WHILE BEING REACTABLE WITH SAID DISSOLVED OXYGEN TO CHANGE THE CONDUCTANCE OF SAID LIQUID, WITH SAID PREDETERMINED ION SPECIES NOT BEING REACTABLE WITH SAID NITRIC OXIDE; AND MEASURING THE CONDUCTANCE OF SAID LIQUID SO THAT THE OXYGEN CONTENT OF SAID LIQUID MAY BE DETERMINED BY THE CHANGE IN CONDUCTANCE THEREOF.
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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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |