US3136602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of nitrogen dioxide
Assignee: Arthur G McKee and Co
•
Filing: 1961-07-10
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Granted: 1964-06-09
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Expires: 1981-07-10
Abstract
No abstract record available.
Inventors
- 👤 John H Berger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:43
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/20; C01B21/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN THE PRODUCTION OF NITROGEN DIOXIDE FROM THE OXIDATION OF AMMONIA TO A MIXTURE OF NITRIC OXIDE, AND WATER AND THE SUBSEQUENT CONSERVATION OF NITRIC OXIDE TO NITROGEN DIOXIDE, THE STEPS OF COOLING THE PRODUCTS OF OXIDATION OF THE AMMONIA AND CONDENSING THEREFROM 35%-45% NITRIC ACID BY MAINTAINING THE TEMPERATURE OF THE CONDENSING STEP AT FROM ABOUT 150*F TO ABOUT 180* F. SO THAT THE RATIO OF NITRIC OXIDE TO NITROGEN DIOXIDE IN THE MIXTURE OF GAS LEAVING THE CONDENSING STEP IS APPROXIMATELY ONE-TO-ONE, WITHDRAWING SAID 35%-45% NITRIC ACID, PASSING SAID MIXTURE OF GAS IN CONTACT WITH 80%100% NITRIC ACID AT A TEMPERATURE OF APPROXIMATELY 35*F.-40*F. WHEREBY THE NITRIC OXIDE IN SAID MIXTURE OF GAS AND SAID NITRIC ACID OXIDIZE AND DECOMPOSE TO FORM NITROGEN DIOXIDE AND WATER ACCORDING TO THE EQUATION NO+2HNO3=3NO2+H2O AND 55%-75% NITRIC ACID, AND CONDENSING AND WITHDRAWING SUBSTANTIALLY ALL OF SAID NITROGEN DIOXIDE AS A PRODUCT.
Claim 2
Dependent Claim
150 words
IN THE PRODUCTION OF NITROGEN DIOXIDE FROM THE OXIDATION OF AMMONIA TO A MIXTURE OF NITRIC OXIDE, AND WATER AND THE SUBSEQUENT CONSERVATION OF NITRIC OXIDE TO NITROGEN DIOXIDE, THE STEPS OF COOLING THE PRODUCTS OF OXIDATION OF THE AMMONIA AND CONDENSING THEREFROM 35%-45% NITRIC ACID BY MAINTAINING THE TEMPERATURE OF THE CONDENSING STEP AT FROM ABOUT 150*F TO ABOUT 180* F. SO THAT THE RATIO OF NITRIC OXIDE TO NITROGEN DIOXIDE IN THE MIXTURE OF GAS LEAVING THE CONDENSING STEP IS APPROXIMATELY ONE-TO-ONE, WITHDRAWING SAID 35%-45% NITRIC ACID, PASSING SAID MIXTURE OF GAS IN CONTACT WITH 80%100% NITRIC ACID AT A TEMPERATURE OF APPROXIMATELY 35*F.-40*F. WHEREBY THE NITRIC OXIDE IN SAID MIXTURE OF GAS AND SAID NITRIC ACID OXIDIZE AND DECOMPOSE TO FORM NITROGEN DIOXIDE AND WATER ACCORDING TO THE EQUATION NO+2HNO3=3NO2+H2O AND 55%-75% NITRIC ACID, AND CONDENSING AND WITHDRAWING SUBSTANTIALLY ALL OF SAID NITROGEN DIOXIDE AS A PRODUCT.
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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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |