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US3255122A
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Control of surface area in a catalyst manufacturing process
Assignee: Chevron USA Inc
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Filing: 1962-01-02
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Granted: 1966-06-07
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Expires: 1982-01-02
Abstract
No abstract record available.
Inventors
- 👤 Constabaris George
- 👤 Bernard F Mulaskey
- 👤 Robert H Lindquist
- 👤 Thomas G Chin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:26
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N15/088; G01N15/0893; Y; Y10; Y10S; Y10S502/00; Y10S502/523
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
161 words
IN A CATALYST MANUFACTURING PROCESS HAVING A HEAT TREATING STEP WHICH SUBSTANTIALLY CONTROLS THE SURFACE AREA OF THE RESULTING CATALYST, THE IMPROVEMENT WHICH COMPRISES TAKING A SERIES OF SUBSTANTIALLY DRIED SAMPLES OF THE CATALYST FROM THE HEAT TREATING STEP, INTRODUCING EACH OF SAID SAMPLES INTO A CLOSED CHAMBER, SUBJECTING EACH OF SAID SAMPLES IN SAID CHAMBER TO A PRESSURE OF AN ADSORBING GAS INCREASED BY A FIXED AMOUNT AND AT A FIXED TEMPERATURE ABOVE THE CRITICAL TEMPERA TURE OF SAID GAS, MEASURING THE DIFFERENCE BETWEEN THE RESULTING VOLUME OF GAS IN SAID CHAMBER AND THE GAS VOLUME OBTAINABLE UNDER THE SAME CONDITIONS WITH A NONADSORBING GAS, WHICH DIFFERENCE IS PROPORTIONAL TO THE SURFACE AREA OF THE CATALYST, AND THEN ADJUSTING THE TEMPERATURE IN THE HEAT TREATING STEP IN PROPORTION TO THE CHANGE IN SAID DIFFERENCE FROM THE VOLUME DIFFERENCAE OBTAINED IN THE SAME WAY FOR A PREVIOUS SAMPLE WHEREBY THE SURFACE AREA OF SAID CATALYST PRODUCED IN THE PROCESS IS CONTROLLED.
Claim 2
Dependent Claim
161 words
IN A CATALYST MANUFACTURING PROCESS HAVING A HEAT TREATING STEP WHICH SUBSTANTIALLY CONTROLS THE SURFACE AREA OF THE RESULTING CATALYST, THE IMPROVEMENT WHICH COMPRISES TAKING A SERIES OF SUBSTANTIALLY DRIED SAMPLES OF THE CATALYST FROM THE HEAT TREATING STEP, INTRODUCING EACH OF SAID SAMPLES INTO A CLOSED CHAMBER, SUBJECTING EACH OF SAID SAMPLES IN SAID CHAMBER TO A PRESSURE OF AN ADSORBING GAS INCREASED BY A FIXED AMOUNT AND AT A FIXED TEMPERATURE ABOVE THE CRITICAL TEMPERA TURE OF SAID GAS, MEASURING THE DIFFERENCE BETWEEN THE RESULTING VOLUME OF GAS IN SAID CHAMBER AND THE GAS VOLUME OBTAINABLE UNDER THE SAME CONDITIONS WITH A NONADSORBING GAS, WHICH DIFFERENCE IS PROPORTIONAL TO THE SURFACE AREA OF THE CATALYST, AND THEN ADJUSTING THE TEMPERATURE IN THE HEAT TREATING STEP IN PROPORTION TO THE CHANGE IN SAID DIFFERENCE FROM THE VOLUME DIFFERENCAE OBTAINED IN THE SAME WAY FOR A PREVIOUS SAMPLE WHEREBY THE SURFACE AREA OF SAID CATALYST PRODUCED IN THE PROCESS IS CONTROLLED.
Claim 3
Dependent Claim
153 words
IN A CATALYST MANUFACTURING PROCESS HAVING A HEAT TREATING STEP WHICH SUBSTANTIALLY CONTROLS THE SURFACE AREA OF THE RESULTING CATALYST, THE IMPROVEMENT WHICH COMPRISES TAKING A SERIES OF SUBSTANTIALLY DRIED SAMPLES OF THE CATALYST FROM THE HEAT TREATING STEP, INTORDUCING EACH OF SAID SAMPLES INTO A CLOSED CHAMBER, SUBJECTING EACH OF SAID SAMPLES AT A FIXED TEMPERATURE IN SAID CHAMBER TO A FIXED VOLUME OF AN ADSORBING GAS AT A SUPERATMOSPHERIC PRESSURE AND A TEMPERATURE ABOVE THE CRITICAL TEMPERATURE OF SAID GAS, MEASURING THE DIFFERENCE BETWEEN THE RESULTING PRESSURE AND THE PRESSURE OBTAINABLE UNDER THE SAME CONDITIONS W%ITH A NONADSORBING GAS, WHICH DIFFERENCE IS PROPORTIONAL TO THE SURFACE AREA OF THE CATALYST AND THEN ADJUSTING THE TEMPERATURE IN THE HEAT TREATING STEP IN PROPORTION TO THE CHANGE IN SAID PRESUSRE DIFFERENCE FROM THE PRESSURE DIFFERENCE OBTAINED FOR THE PREVIOUS SAMPLE WHEREBY THE SURFACE AREA OF SAID CATALYST PRODUCED IN THE PROCESS IS CONTROLLED.
Claim 4
Dependent Claim
153 words
IN A CATALYST MANUFACTURING PROCESS HAVING A HEAT TREATING STEP WHICH SUBSTANTIALLY CONTROLS THE SURFACE AREA OF THE RESULTING CATALYST, THE IMPROVEMENT WHICH COMPRISES TAKING A SERIES OF SUBSTANTIALLY DRIED SAMPLES OF THE CATALYST FROM THE HEAT TREATING STEP, INTORDUCING EACH OF SAID SAMPLES INTO A CLOSED CHAMBER, SUBJECTING EACH OF SAID SAMPLES AT A FIXED TEMPERATURE IN SAID CHAMBER TO A FIXED VOLUME OF AN ADSORBING GAS AT A SUPERATMOSPHERIC PRESSURE AND A TEMPERATURE ABOVE THE CRITICAL TEMPERATURE OF SAID GAS, MEASURING THE DIFFERENCE BETWEEN THE RESULTING PRESSURE AND THE PRESSURE OBTAINABLE UNDER THE SAME CONDITIONS W%ITH A NONADSORBING GAS, WHICH DIFFERENCE IS PROPORTIONAL TO THE SURFACE AREA OF THE CATALYST AND THEN ADJUSTING THE TEMPERATURE IN THE HEAT TREATING STEP IN PROPORTION TO THE CHANGE IN SAID PRESUSRE DIFFERENCE FROM THE PRESSURE DIFFERENCE OBTAINED FOR THE PREVIOUS SAMPLE WHEREBY THE SURFACE AREA OF SAID CATALYST PRODUCED IN THE PROCESS IS CONTROLLED.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |