US2667503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing ortho sulfonyl chloride benzoic acid esters
Assignee: Maumee Dev Co
•
Filing: 1951-07-27
•
Granted: 1954-01-26
•
Expires: 1971-07-27
Abstract
No abstract record available.
Inventors
- 👤 Oliver F Senn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:51
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/02; C07C303/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN A METHOD FOR PREPARING ORTHO SULFONYL CHLORIDE BENZOIC ACID ESTERS, THE STEPS WHICH COMPRISE INTIMATELY CONTACTING AN AQUEOUS SUSPENSION OF AN ESTER OF 2,2''-DICARBOXY-DIPHENYL-DISULFIDE WITH A MONOHYDROXY ALCOHOL HAVING LESS THAN 8 CARBON ATOMS IN THE MOLECULE, AT A TEMPERATURE BELOW 40* C. WITH CHLORINE UNTIL REACTTION TO FORM THE SULFONYL CHLORIDE IS SUBSTANTIALLY COMPLETE, AND SEPARATING THE SUSPENDED REACTION PRODUCT.
Claim 2
Dependent Claim
62 words
IN A METHOD FOR PREPARING ORTHO SULFONYL CHLORIDE BENZOIC ACID ESTERS, THE STEPS WHICH COMPRISE INTIMATELY CONTACTING AN AQUEOUS SUSPENSION OF AN ESTER OF 2,2''-DICARBOXY-DIPHENYL-DISULFIDE WITH A MONOHYDROXY ALCOHOL HAVING LESS THAN 8 CARBON ATOMS IN THE MOLECULE, AT A TEMPERATURE BELOW 40* C. WITH CHLORINE UNTIL REACTTION TO FORM THE SULFONYL CHLORIDE IS SUBSTANTIALLY COMPLETE, AND SEPARATING THE SUSPENDED REACTION PRODUCT.
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) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |