Patent US2662975A successfully refreshed from Google Patents.
US3267027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of desulfurization employing alkali and nitrogen dioxide
Assignee: Union Oil Company of California
•
Filing: 1961-07-17
•
Granted: 1966-08-16
•
Expires: 1981-07-17
Abstract
No abstract record available.
Inventors
- 👤 William L Fierce
- 👤 Walter J Sandner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:51
CPC Classifications
C; C10; C10G; C10G53/00; C10G53/02; C10G53/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A METHOD OF PRODUCING PETROLEUM PRODUCTS OF DIMINISHED SULFUR CONTENT AND IMPROVED ODOR WHICH CONSISTS ESSENTIALLY OF CONTACTING A SOUR LIGHT NAPHTHA WITH NITROGEN DIOXIDE AT ABOUT 0*-35*C., WASHING THE TREATED DISTILLATE WITH AQUEOUS ALKALI UNTIL FREE OF COLOR, AND WASHING THE COLOR-FREE PRODUCT WITH WATER UNTIL FREE OF ALKALI.
Claim 2
Independent Claim
50 words
A METHOD OF PRODUCING PETROLEUM PRODUCTS OF DIMINISHED SULFUR CONTENT AND IMPROVED ODOR WHICH CONSISTS ESSENTIALLY OF CONTACTING A SOUR LIGHT NAPHTHA WITH NITROGEN DIOXIDE AT ABOUT 0*-35*C., WASHING THE TREATED DISTILLATE WITH AQUEOUS ALKALI UNTIL FREE OF COLOR, AND WASHING THE COLOR-FREE PRODUCT WITH WATER UNTIL FREE OF ALKALI.
References Cited (Backward Citations)
US522028A
Cited
FR964355A
Cited
US2009898A
Cited
US1935207A
Cited
US1962181A
Cited
US3135680A
Cited
US3164546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |