US2771482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitric acid oxidation of hydrocarbons
Assignee: Gulf Research and Development Co
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Filing: 1953-08-26
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Granted: 1956-11-20
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Expires: 1973-08-26
Abstract
No abstract record available.
Inventors
- 👤 Jr George P Brown
- 👤 Edgar I Crowley
- 👤 Norman W Franke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:47
CPC Classifications
C; C07; C07C; C07C55/00; C07C55/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A PROCESS FOR THE PRODUCTION OF DIBASIC ACID FROM A CHARGE STOCK CONSISTING ESSENTIALLY OF SATURATED ALIPHATIC HYDROCARBONS BOILING ABOVE ABOUT 250* F. AND HAVING AT LEAST EIGHT CARBON ATOMS, COMPRISING SUBJECTING THE CHARGE STOCK OF OXIDATION WITH AN OXYGEN-CONTAINING GAS FOR A TIME SUFFICIENT TO OBTAIN A PRODUCT HAVING A SAPONIFICATION NUMBER ABOVE ABOUT 100 AND THEREAFTER SUBJECTING SAID PRODUCT TO FURTHER OXIDATION AT AN ELEVATED TEMPERATURE OF ABOUT 50* C. TO ABOUT 150* C. WITH NITRIC ACID HAVING A CONCENTRATION ABOVE ABOUT 50 PERCENT FOR A TIME SUFFICIENT TO OBTAIN SUBSTANTIAL AMOUNTS OF DIBASIC ACIDS WHILE ADMIXING WITH THE GASEOUS MIXTURE COMPRISING NITROGEN OXIDES FORMED DURING SAID NITRIC ACID REACTION AN OXYGEN-CONTAINING GAS IN AMOUNTS AND FOR A TIME SUFFICIENT TO REGENERATE SAID NITROGEN OXIDES, AND EMPLOYING THE PRODUCTS RESULTING FROM SAID REGENERATION IN SAID NITRIC ACID REACTION.
Claim 2
Dependent Claim
140 words
A PROCESS FOR THE PRODUCTION OF DIBASIC ACID FROM A CHARGE STOCK CONSISTING ESSENTIALLY OF SATURATED ALIPHATIC HYDROCARBONS BOILING ABOVE ABOUT 250* F. AND HAVING AT LEAST EIGHT CARBON ATOMS, COMPRISING SUBJECTING THE CHARGE STOCK OF OXIDATION WITH AN OXYGEN-CONTAINING GAS FOR A TIME SUFFICIENT TO OBTAIN A PRODUCT HAVING A SAPONIFICATION NUMBER ABOVE ABOUT 100 AND THEREAFTER SUBJECTING SAID PRODUCT TO FURTHER OXIDATION AT AN ELEVATED TEMPERATURE OF ABOUT 50* C. TO ABOUT 150* C. WITH NITRIC ACID HAVING A CONCENTRATION ABOVE ABOUT 50 PERCENT FOR A TIME SUFFICIENT TO OBTAIN SUBSTANTIAL AMOUNTS OF DIBASIC ACIDS WHILE ADMIXING WITH THE GASEOUS MIXTURE COMPRISING NITROGEN OXIDES FORMED DURING SAID NITRIC ACID REACTION AN OXYGEN-CONTAINING GAS IN AMOUNTS AND FOR A TIME SUFFICIENT TO REGENERATE SAID NITROGEN OXIDES, AND EMPLOYING THE PRODUCTS RESULTING FROM SAID REGENERATION IN SAID NITRIC ACID REACTION.
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) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |