US2715142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing vinyl sulfonamides
Assignee: Monsanto Chemicals Ltd
•
Filing: 1954-02-23
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Granted: 1955-08-09
•
Expires: 1974-02-23
Abstract
No abstract record available.
Inventors
- 👤 Harold F Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:04
CPC Classifications
C; C07; C07C; C07C311/00; C07C311/01; C07C311/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A VAPOR PHASE PROCESS FOR CONVERTING AMMONIUM VINYL SULFONATE TO VINYL SULFONAMIDE WHICH COMPRISES HEATING SAID SULFONATE TO A TEMPERATURE OF FROM 250 TO 400* C. IN THE PRESENCE OF A SMALL AMOUNT OF A MATERIAL TAKEN FROM THE GROUP CONSISTING OF SULFUR AND SUBSTITUTED PHENOLS WHICH WILL NOT VAPORIZE AT THE TEMPERATURE USE.
Claim 2
Dependent Claim
54 words
A VAPOR PHASE PROCESS FOR CONVERTING AMMONIUM VINYL SULFONATE TO VINYL SULFONAMIDE WHICH COMPRISES HEATING SAID SULFONATE TO A TEMPERATURE OF FROM 250 TO 400* C. IN THE PRESENCE OF A SMALL AMOUNT OF A MATERIAL TAKEN FROM THE GROUP CONSISTING OF SULFUR AND SUBSTITUTED PHENOLS WHICH WILL NOT VAPORIZE AT THE TEMPERATURE USE.
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) | 1958-08-08 | 1959-02-07 | 1959-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-08 | 1963-02-07 | 1963-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-08 | 1967-02-07 | 1967-08-09 | $7700.00 | Window Closed / Lapsed |