Patent US2702273A successfully refreshed from Google Patents.
US2702273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of organic sulphonic acids
Assignee: Monsanto Chemicals Ltd
•
Filing: 1950-12-01
•
Granted: 1955-02-15
•
Expires: 1970-12-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:15
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/02; C07C303/14; Y; Y10; Y10S; Y10S204/00; Y10S204/902; Y10S204/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
IN THE METHOD FOR PRODUCING A ORGANIC SULPHONIC ACID BY THE REACTION OF A SATURATED HYDROCARBON WITH SULFUR DIOXIDE AND OXYGEN, THE IMPROVEMENT COMPRISING THE DIRECT FORMATION OF THE SULPHONIC ACID BY CARRYING OUT THE REACTION BETWEEN REACTANTS CONSISTING OF THE SATURATED HYDROCARBON IN THE LIQUID PHASE, OXYGEN AND SULFUR DIOXIDE, AND AT LEAST FOR A SUBSTANTIAL INITIAL DURATION OF THE REACTION IN THE PRESENCE OF RADIATION OF A WAVE LENGTH OF LESS THAN 5000 ANGSTROM UNITS AND IN THE PRESENCE OF ABOUT 2% BY WEIGHT OF CHLORINE BASED ON THE SUM OF THE WEIGHT OF SULFUR DIOXIDE AND OXLYGEN EMPLOYED.
Claim 2
Dependent Claim
101 words
IN THE METHOD FOR PRODUCING A ORGANIC SULPHONIC ACID BY THE REACTION OF A SATURATED HYDROCARBON WITH SULFUR DIOXIDE AND OXYGEN, THE IMPROVEMENT COMPRISING THE DIRECT FORMATION OF THE SULPHONIC ACID BY CARRYING OUT THE REACTION BETWEEN REACTANTS CONSISTING OF THE SATURATED HYDROCARBON IN THE LIQUID PHASE, OXYGEN AND SULFUR DIOXIDE, AND AT LEAST FOR A SUBSTANTIAL INITIAL DURATION OF THE REACTION IN THE PRESENCE OF RADIATION OF A WAVE LENGTH OF LESS THAN 5000 ANGSTROM UNITS AND IN THE PRESENCE OF ABOUT 2% BY WEIGHT OF CHLORINE BASED ON THE SUM OF THE WEIGHT OF SULFUR DIOXIDE AND OXLYGEN EMPLOYED.
References Cited (Backward Citations)
US2061617A
Cited
US2174110A
Cited
US2046090A
Cited
USRE20968E
Cited
US2202791A
Cited
US2434746A
Cited
US2412909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-14 | 1958-08-16 | 1959-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-14 | 1962-08-16 | 1963-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-14 | 1966-08-16 | 1967-02-15 | $7700.00 | Window Closed / Lapsed |