US2842583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing 1, 3-bis (dimethylthiocarbamyl-mercaptomethyl)-urea
Assignee: EIDP Inc
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Filing: 1955-08-04
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Granted: 1958-07-08
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Expires: 1975-08-04
Abstract
No abstract record available.
Inventors
- 👤 Walter C Meuly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:06
CPC Classifications
C; C07; C07C; C07C327/00; C07C327/38; C07C327/40; C07C327/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR PRODUCING 1,3-BIS(DIMETHYLTHIOCARBAMYL-MERCAPTOMETHYL)-UREA, WHICH COMPRISES REACTING TOGETHER, AT 0* TO 60*C., IN AQUEOUS MEDIUM AND IN ESSENTIALLY STOICHIOMETRIC PROPORTIONS, UREA, FORMALDEHYDE AND A REACTANT OF THE GROUP CONSISTING OF (1) A MIXTURE OF CARBON DISULFIDE AND THE DIMETHYLAMINE, (2) A MIXTURE OF CARBON DISULFIDE AND THE DIMETHYLAMMONIUM SALT OF DIMETHYL DITHIOCARBAMIC ACID, AND (3) A MIXTURE OF A WATERSOLUBLE SALT OF DIMETHYL DITHIOCARBAMIC ACID AND AN ACID ADAPTED TO LIBERATE DIMETHYL DITHIOCARBAMIC ACID FROM SAID SALT IN AQUEOUS MEDIUM, AND RECOVERING THE REACTION PRODUCT.
Claim 2
Dependent Claim
86 words
A PROCESS FOR PRODUCING 1,3-BIS(DIMETHYLTHIOCARBAMYL-MERCAPTOMETHYL)-UREA, WHICH COMPRISES REACTING TOGETHER, AT 0* TO 60*C., IN AQUEOUS MEDIUM AND IN ESSENTIALLY STOICHIOMETRIC PROPORTIONS, UREA, FORMALDEHYDE AND A REACTANT OF THE GROUP CONSISTING OF (1) A MIXTURE OF CARBON DISULFIDE AND THE DIMETHYLAMINE, (2) A MIXTURE OF CARBON DISULFIDE AND THE DIMETHYLAMMONIUM SALT OF DIMETHYL DITHIOCARBAMIC ACID, AND (3) A MIXTURE OF A WATERSOLUBLE SALT OF DIMETHYL DITHIOCARBAMIC ACID AND AN ACID ADAPTED TO LIBERATE DIMETHYL DITHIOCARBAMIC ACID FROM SAID SALT IN AQUEOUS MEDIUM, AND RECOVERING THE REACTION PRODUCT.
References Cited (Backward Citations)
US2068355A
Cited
US2496941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |