US2830084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of naphthenes
Assignee: American Oil Co
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Filing: 1956-05-29
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Granted: 1958-04-08
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Expires: 1976-05-29
Abstract
No abstract record available.
Inventors
- 👤 Jr William H Clingman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:28
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/31; C07C51/316
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN THE PROCESS OF OXIDIZING NAPHTHENES TO DIBASIC ACIDS WHEREIN LIQUID NAPHTHENE IS CONTACTED WITH NITROGEN DIOXIDE AND OXYGEN IN A REACTION ZONE, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID CONTACTING AT A TEMPERATURE BETWEEN ABOUT 75*C. AND 200*C. IN THE PRESENCE OF ACETIC ACID AND AT LEAST 0.1 MOL OF SULFURIC ACID PER MOL OF NAPHTHENE WHILE MAINTAINING AN OXYGEN PARTIAL PRESSURE IN THE REACTION ZONE OF BETWEEN ABOUT 2 AND 30 ATMOSPHERES.
Claim 2
Dependent Claim
73 words
IN THE PROCESS OF OXIDIZING NAPHTHENES TO DIBASIC ACIDS WHEREIN LIQUID NAPHTHENE IS CONTACTED WITH NITROGEN DIOXIDE AND OXYGEN IN A REACTION ZONE, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID CONTACTING AT A TEMPERATURE BETWEEN ABOUT 75*C. AND 200*C. IN THE PRESENCE OF ACETIC ACID AND AT LEAST 0.1 MOL OF SULFURIC ACID PER MOL OF NAPHTHENE WHILE MAINTAINING AN OXYGEN PARTIAL PRESSURE IN THE REACTION ZONE OF BETWEEN ABOUT 2 AND 30 ATMOSPHERES.
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) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |