Patent US3174824A successfully refreshed from Google Patents.
US3174824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing an aqueous solution of ammonium nitrate of predetermined concentration and apparatus therefor
Assignee: Phillips Petroleum Co
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Filing: 1962-03-26
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Granted: 1965-03-23
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Expires: 1982-03-26
Abstract
No abstract record available.
Inventors
- 👤 Dale E Lupfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:35
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/18; C01C1/185
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
103 words
A METHOD OF PRODUCING AN AQUEOUS SOLUTION OF AMMONIUM NITRATE OF PREDETERMINED CONCENTRATION WHICH COMPRISES MIXING NITRIC ACID AND AMMONIA TO PRODUCE AMMONIUM NITRATE, HEATING THE AMMONIUM NITRATE TO EVAPORATE WATER THEREFROM, PASSING A SAMPLE OF THE RESULTING CONCENTRATED AMMONIUM NITRATE TO A SAMPLE CHAMBER, COOLING THE SAMPLE PASSED TO THE CHAMBER SO THAT THE SAMPLE IN THE CHAMBER IS MAINTAINED AT APPROXIMATELY THE FUDGE POINT OF THE AMMONIUM NITRATE SOLUTION, MEASURING THE TEMPERATURE OF THE SOLUTION IN THE SAMPLE CHAMBER, AND ADJUSTING THE HEATING OF THE AMMONIUM NITRATE IN RESPONSE TO THE TEMPERATURE MEASUREMENT TO TEND TO MAINTAIN THE MEASURED TEMPERATURE CONSTANT.
Claim 2
Independent Claim
103 words
A METHOD OF PRODUCING AN AQUEOUS SOLUTION OF AMMONIUM NITRATE OF PREDETERMINED CONCENTRATION WHICH COMPRISES MIXING NITRIC ACID AND AMMONIA TO PRODUCE AMMONIUM NITRATE, HEATING THE AMMONIUM NITRATE TO EVAPORATE WATER THEREFROM, PASSING A SAMPLE OF THE RESULTING CONCENTRATED AMMONIUM NITRATE TO A SAMPLE CHAMBER, COOLING THE SAMPLE PASSED TO THE CHAMBER SO THAT THE SAMPLE IN THE CHAMBER IS MAINTAINED AT APPROXIMATELY THE FUDGE POINT OF THE AMMONIUM NITRATE SOLUTION, MEASURING THE TEMPERATURE OF THE SOLUTION IN THE SAMPLE CHAMBER, AND ADJUSTING THE HEATING OF THE AMMONIUM NITRATE IN RESPONSE TO THE TEMPERATURE MEASUREMENT TO TEND TO MAINTAIN THE MEASURED TEMPERATURE CONSTANT.
Claim 3
Dependent Claim
174 words
APPARATUS FOR PRODUCING AN AQUEOUS OLUTION OF AMMONIUM NITRATE OF PREDETERMINED CONCENTRATION WHICH COMPRISES MIXING MEANS TO CONTACT NITRIC ACID WITH AMMONIA, EVAPORATING MEANS HAVING HEATING MEANS OPERABLY ASSOCIATED WITH SAID EVAPORATING MEANS SO AS TO SUPPLY HEAT THERETO, MEANS TO PASS AMMONIUM NITRATE FROM SAID MIXING MEANS TO SAID EVAPORATING MEANS, MEANS TO WITHDRAW AMMONIUM NITRATE FROM SAID EVAPORATING MEANS, A SAMPLE CELL, MEANS TO PASS A SAMPLE FROM SAID MEANS TO WITHDRAW THROUGH SAID CELL, MEANS TO COOL THE SAMPLE PASSED TO SAID CELL, MEANS TO MEASURE A PROPERTY OF THE SAMPLE IN SAID CELL REPRESENTATIVE OF THE FUDGE POINT OF THE AMMONIUM NITRATE SOLUTION, MEANS RESPONSIVE TO SIAD MEANS TO MEASURE TO ADJUST SAID MEANS TO COOL SO THAT THE SAMPLE IN SIAD CELL IS MAINTAINED AT APPROXIMATELY SAID FUDGE POINT, MEANS TO MEASURE THE TEMPERATURE OF FLUID IN SAID CELL, AND MEANS RESPONSIVE TO SAID MEANS TO MEASURE TEMPERATURE TO ADJUST SAID HEATING MEANS OPERABLY ASSOCIATED WITH SAID EVAPORATING MEANS SO AS TO TEND TO MAINTAIN THE MEASURED TEMPERATURE CONSTANT.
Claim 4
Dependent Claim
174 words
APPARATUS FOR PRODUCING AN AQUEOUS OLUTION OF AMMONIUM NITRATE OF PREDETERMINED CONCENTRATION WHICH COMPRISES MIXING MEANS TO CONTACT NITRIC ACID WITH AMMONIA, EVAPORATING MEANS HAVING HEATING MEANS OPERABLY ASSOCIATED WITH SAID EVAPORATING MEANS SO AS TO SUPPLY HEAT THERETO, MEANS TO PASS AMMONIUM NITRATE FROM SAID MIXING MEANS TO SAID EVAPORATING MEANS, MEANS TO WITHDRAW AMMONIUM NITRATE FROM SAID EVAPORATING MEANS, A SAMPLE CELL, MEANS TO PASS A SAMPLE FROM SAID MEANS TO WITHDRAW THROUGH SAID CELL, MEANS TO COOL THE SAMPLE PASSED TO SAID CELL, MEANS TO MEASURE A PROPERTY OF THE SAMPLE IN SAID CELL REPRESENTATIVE OF THE FUDGE POINT OF THE AMMONIUM NITRATE SOLUTION, MEANS RESPONSIVE TO SIAD MEANS TO MEASURE TO ADJUST SAID MEANS TO COOL SO THAT THE SAMPLE IN SIAD CELL IS MAINTAINED AT APPROXIMATELY SAID FUDGE POINT, MEANS TO MEASURE THE TEMPERATURE OF FLUID IN SAID CELL, AND MEANS RESPONSIVE TO SAID MEANS TO MEASURE TEMPERATURE TO ADJUST SAID HEATING MEANS OPERABLY ASSOCIATED WITH SAID EVAPORATING MEANS SO AS TO TEND TO MAINTAIN THE MEASURED TEMPERATURE CONSTANT.
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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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |