Patent US1672960A successfully refreshed from Google Patents.
Patent US3294677A successfully refreshed from Google Patents.
US3294677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desulfurizing petroleum fractions with nitrogen dioxide and sulfuric acid
Assignee: Howe Baker Engineers LLC
•
Filing: 1964-02-05
•
Granted: 1966-12-27
•
Expires: 1984-02-05
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Martin
- 👤 Jr Alfred R Pate
- 👤 Raymond E Hargis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:10
CPC Classifications
C; C10; C10G; C10G17/00; C10G17/02; C10G17/04; C10G17/06; C10G27/00; C10G27/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR TREATING A HYDROCARBON STREAM CONTAINING SULFUR COMPONENTS WHICH COMPRISES: INTIMATELY AND VIGOROUSLY ADMIXING NITROSYL SULFURIC ACID AND SULFURIC ACID WITH SAID STREAM WHILE ADDING OXYGEN TO SAID STREAM, THE AMOUNT OF OXYGEN BEING IN EXCESS OF THE AMOUNT REQUIRED TO OXIDIZE THE SULFUR COMPOUNDS PRESENT IN THE HYDROCARBON, THE MIXING OF SAID HYDROCARBON STREAM AND THE TREATING AGENTS BEING CARRIED OUT AT A TEMPERATURE OF FROM ABOUT 30 TO ABOUT 250* F.
Claim 2
Dependent Claim
75 words
A PROCESS FOR TREATING A HYDROCARBON STREAM CONTAINING SULFUR COMPONENTS WHICH COMPRISES: INTIMATELY AND VIGOROUSLY ADMIXING NITROSYL SULFURIC ACID AND SULFURIC ACID WITH SAID STREAM WHILE ADDING OXYGEN TO SAID STREAM, THE AMOUNT OF OXYGEN BEING IN EXCESS OF THE AMOUNT REQUIRED TO OXIDIZE THE SULFUR COMPOUNDS PRESENT IN THE HYDROCARBON, THE MIXING OF SAID HYDROCARBON STREAM AND THE TREATING AGENTS BEING CARRIED OUT AT A TEMPERATURE OF FROM ABOUT 30 TO ABOUT 250* F.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |