US2678333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aminomethylsulfonic acid in the mannich and related reactions
Assignee: ExxonMobil Oil Corp
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Filing: 1950-04-29
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Granted: 1954-05-11
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Expires: 1970-04-29
Abstract
No abstract record available.
Inventors
- 👤 Howard D Hartough
- 👤 Jr Joseph J Dickert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:13
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/13; C07C309/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
61 words
A PROCESS FOR PREPARING A SUBSTITUTED AMINOMETHYLSULFONIC ACID, WHICH COMPRISES REACTING AN ETHYLENICALLY UNSATURATED HYDROCARBON, FORMALDEHYDE, AND AN AMINOALKYLSULFONIC ACID HAVING THE FORMULA, RNHCH2SO3H, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN ATOMS AND ALKYL GROUPS, AT A TEMPERATURE NOT GREATER THAN ABOUT 110* C. COOLING THE REACTION MIXTURE TO AMBIENT TEMPERATURE, AND SEPARATING A SUBSTITUTED AMINOMETHYLSULFONIC ACID THEREFROM.
References Cited (Backward Citations)
US1999432A
Cited
US2373870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |