US3172732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analytical method and apparatus
Assignee: —
•
Filing: —
•
Granted: 1965-03-09
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Expires: 1982-03-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:34
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/12; G01N27/00; G01N27/02; G01N27/04; G01N27/14; G01N27/18; Y; Y10; Y10T; Y10T436/00; Y10T436/18; Y10T436/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
THE METHOD OF DETERMINING THE AMOUNT OF AN ELEMENT CAPABLE OF FORMING A VOLATILE OR GASEOUS OXIDE AND PRESENT IN A SUBSTANCE WHICH CONTAINS AT LEAST ONE OTHER ELEMENT, SAID METHOD COMPRISING THE STEPS OF REACTING, IN A REACTION ZONE, SOLID PARTICLES OF A REPRESENTATIVE SAMPLE OF KNOWN WEIGHT OF SAID SUBSTANCE WITH OXYGEN AT A TEMPERATURE AT WHICH SAID ELEMENT COMBINES WITH OXYGEN TO FORM A VOLATILE OR GASEOUS OXIDE; MAINTAINING A CONSTANT PRESSURE OF OXYGEN ABOVE ATMOSPHERIC PRESSURE IN SAID REACTION ZONE, WITHDRAWING A STREAM OF OXYGEN AND CONTAINED VOLATILE OR GASEOUS ELEMENT OXIDE FROM SAID REACTION ZONE, AND REDUCING THE PRESSURE OF SAID GAS STREAM TO ABOUT ATMOSPHERIC PRESSURE WHEREBY A SUBSTANTIALLY CONSTANT GAS STREAM FLOW RATTE IS ESTABLISHED DURING OXIDATION OF THE SAMPLE; TRANSLATING CHANGES IN THE THERMAL CONDUCTIVITY OF SAID GAS STREAM DURING THE FLOW THEREOF INTO ELECTRICAL IMPULSES; INTEGRATING AND ACCUMULATING SAID ELECTRICAL IMPULSES DURING THE FLOW OF SAID GAS STREAM; AND CONTINUING THE OXIDATION OF SAID SAMPLE UNTIL SAID ELEMENT HAS BEEN REMOVED THERFROM AND CARRIED PAST SAID THERMAL CONDUCTIVITY TRANSLATING STEP.
Claim 2
Independent Claim
179 words
THE METHOD OF DETERMINING THE AMOUNT OF AN ELEMENT CAPABLE OF FORMING A VOLATILE OR GASEOUS OXIDE AND PRESENT IN A SUBSTANCE WHICH CONTAINS AT LEAST ONE OTHER ELEMENT, SAID METHOD COMPRISING THE STEPS OF REACTING, IN A REACTION ZONE, SOLID PARTICLES OF A REPRESENTATIVE SAMPLE OF KNOWN WEIGHT OF SAID SUBSTANCE WITH OXYGEN AT A TEMPERATURE AT WHICH SAID ELEMENT COMBINES WITH OXYGEN TO FORM A VOLATILE OR GASEOUS OXIDE; MAINTAINING A CONSTANT PRESSURE OF OXYGEN ABOVE ATMOSPHERIC PRESSURE IN SAID REACTION ZONE, WITHDRAWING A STREAM OF OXYGEN AND CONTAINED VOLATILE OR GASEOUS ELEMENT OXIDE FROM SAID REACTION ZONE, AND REDUCING THE PRESSURE OF SAID GAS STREAM TO ABOUT ATMOSPHERIC PRESSURE WHEREBY A SUBSTANTIALLY CONSTANT GAS STREAM FLOW RATTE IS ESTABLISHED DURING OXIDATION OF THE SAMPLE; TRANSLATING CHANGES IN THE THERMAL CONDUCTIVITY OF SAID GAS STREAM DURING THE FLOW THEREOF INTO ELECTRICAL IMPULSES; INTEGRATING AND ACCUMULATING SAID ELECTRICAL IMPULSES DURING THE FLOW OF SAID GAS STREAM; AND CONTINUING THE OXIDATION OF SAID SAMPLE UNTIL SAID ELEMENT HAS BEEN REMOVED THERFROM AND CARRIED PAST SAID THERMAL CONDUCTIVITY TRANSLATING STEP.
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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |