Patent US2531283A successfully refreshed from Google Patents.
US2531283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of thioacetamide
Assignee: Rohm and Haas Co
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Filing: 1948-06-23
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Granted: 1950-11-21
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Expires: 1968-06-23
Abstract
No abstract record available.
Inventors
- 👤 Charles L Levesque
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:48
CPC Classifications
C; C07; C07C; C07C279/00; C07C279/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE PROCESS OF PREPARING A MIXTURE OF THIOACETAMIDES AND DITHIOOXALODIAMIDES WHICH COMPRISES REACTING UNDER ANHYDRONS CONDITIONS AND AT A TEMPEATURE FROM 80*C. TO 300*C. (A) SULFUR, (B) A MEMBER OF THE CLASS CONSISTING OF VINYL ETHERS AND VINYL ESTERS HAVING, RESPECTIVELY, THE FORMULAS R$O$CH=CH2 AND RCOOCH=CH2 IN WHICH R IS A MONOVALENT HYDROCARBON RADICAL FROM THE CLASS CONSISTING OF ALKYL, CYCLOAKYL, AND ARALKYL GROUPS, AND (C) AN AMINO COMPOUND OF THE FORMULA NHR''R" IN WHICH R'' AND R" ARE MEMBERS OF THE CLASS CONSISTING OF HYDROGEN ATOMS AND ALKYL, CYCLOALKY, AND ARALKYL RAICALS,
Claim 2
Dependent Claim
93 words
THE PROCESS OF PREPARING A MIXTURE OF THIOACETAMIDES AND DITHIOOXALODIAMIDES WHICH COMPRISES REACTING UNDER ANHYDRONS CONDITIONS AND AT A TEMPEATURE FROM 80*C. TO 300*C. (A) SULFUR, (B) A MEMBER OF THE CLASS CONSISTING OF VINYL ETHERS AND VINYL ESTERS HAVING, RESPECTIVELY, THE FORMULAS R$O$CH=CH2 AND RCOOCH=CH2 IN WHICH R IS A MONOVALENT HYDROCARBON RADICAL FROM THE CLASS CONSISTING OF ALKYL, CYCLOAKYL, AND ARALKYL GROUPS, AND (C) AN AMINO COMPOUND OF THE FORMULA NHR''R" IN WHICH R'' AND R" ARE MEMBERS OF THE CLASS CONSISTING OF HYDROGEN ATOMS AND ALKYL, CYCLOALKY, AND ARALKYL RAICALS,
References Cited (Backward Citations)
US2495567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |