US2545174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethers of aryl sulfonamide-formaldehyde reaction products
Assignee: Monsanto Chemicals Ltd
•
Filing: 1947-09-27
•
Granted: 1951-03-13
•
Expires: 1967-09-27
Abstract
No abstract record available.
Inventors
- 👤 Sido George Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:02
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A WATER-INSOLUBLE PRODUCT PREPARED BY REACTING AT FROM 0* C. TO 100* C. AND UNDER ALKALINE CONDITIONS FROM 1 TO 2 MOLS OF FORMALDEHYDE WITH 1 MOL OF AN ARYL SULFONAMIDE TAKEN FROM THE GROUP CONSISTING OF BENZENE SULFONAMIDE AND TOLUENE SULFONAMIDES, AND THEN REACTING THE PRODUCT WITH FROM 1 TO 2 MOLS OF A MONOHYDRIC UNSUBSTITUTED ALCOHOL CONTAINING FROM 1 TO 8 CARBON ATOMS IN THE PRESENCE OF FROM 0.25 TO 25 PARTS OF AN ACID CATALYST PER 100 PARTS OF THE ARYL SULFONAMIDE-FORMALDEHYDE CONDENSATION PRODUCT, SAID LATTER REACTION BEING CARRIED OUT AT FROM 0* C. TO REFLUX TEMPERATURE AT ATMOSPHERIC PRESSURE.
Claim 2
Dependent Claim
103 words
A WATER-INSOLUBLE PRODUCT PREPARED BY REACTING AT FROM 0* C. TO 100* C. AND UNDER ALKALINE CONDITIONS FROM 1 TO 2 MOLS OF FORMALDEHYDE WITH 1 MOL OF AN ARYL SULFONAMIDE TAKEN FROM THE GROUP CONSISTING OF BENZENE SULFONAMIDE AND TOLUENE SULFONAMIDES, AND THEN REACTING THE PRODUCT WITH FROM 1 TO 2 MOLS OF A MONOHYDRIC UNSUBSTITUTED ALCOHOL CONTAINING FROM 1 TO 8 CARBON ATOMS IN THE PRESENCE OF FROM 0.25 TO 25 PARTS OF AN ACID CATALYST PER 100 PARTS OF THE ARYL SULFONAMIDE-FORMALDEHYDE CONDENSATION PRODUCT, SAID LATTER REACTION BEING CARRIED OUT AT FROM 0* C. TO REFLUX TEMPERATURE AT ATMOSPHERIC PRESSURE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |