Patent US2775545A successfully refreshed from Google Patents.
US2775545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of sourness of sweet naphthas during distillation by distilling in the presence of an alkylene oxide and a salt of an organic acid
Assignee: Pure Oil Co
•
Filing: 1955-11-07
•
Granted: 1956-12-25
•
Expires: 1975-11-07
Abstract
No abstract record available.
Inventors
- 👤 Walter J Sandner
- 👤 William L Fierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:47
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/20; C10G7/00; C10G7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN THE DISTILLATION OF AN OXIDATIVELY SWEETENED HYDROCARBON FRACTION CONTAINING ORGANIC SULFUR COMPOUNDS, INCLUDING DISULFIDES, AT TEMPERATURES NORMALLY EFFECTIVE FOR THE CONVERSION OF SAID COMPOUNDS TO PRODUCE DOCTORPOSITIVE PRODUCTS, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE DISTILLATION IN THE PRESENCE OF SUFFICIENT AMOUNTS OF AN ADMIXTURE OF ANALKYLENE OXIDE HAVING A BOILING POINT AT LEAST ABOUT AS HIGH AS THE END BOILING POINT OF SAID FRACTION AND AN OIL-SOLUBLE, BASIC SALT OF A HIGH MOLECULAR WEIGHT ORGANIC ACID TO PREVENT SAID CONVERSION AND THE DEVELOPMENT OF A DOCTOR-POSITIVE DISTILLATION EFFLUENT.
Claim 2
Dependent Claim
90 words
IN THE DISTILLATION OF AN OXIDATIVELY SWEETENED HYDROCARBON FRACTION CONTAINING ORGANIC SULFUR COMPOUNDS, INCLUDING DISULFIDES, AT TEMPERATURES NORMALLY EFFECTIVE FOR THE CONVERSION OF SAID COMPOUNDS TO PRODUCE DOCTORPOSITIVE PRODUCTS, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE DISTILLATION IN THE PRESENCE OF SUFFICIENT AMOUNTS OF AN ADMIXTURE OF ANALKYLENE OXIDE HAVING A BOILING POINT AT LEAST ABOUT AS HIGH AS THE END BOILING POINT OF SAID FRACTION AND AN OIL-SOLUBLE, BASIC SALT OF A HIGH MOLECULAR WEIGHT ORGANIC ACID TO PREVENT SAID CONVERSION AND THE DEVELOPMENT OF A DOCTOR-POSITIVE DISTILLATION EFFLUENT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |