US4599425A
Expired / Lapsed
US
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Bis-[2,5-dithio-1,3,4-thiadiazole] and a process for its production
Assignee: Rhein Chemie Rheinau GmbH
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Filing: 1984-10-18
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Granted: 1986-07-08
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Expires: 2004-10-18
Abstract
Abstract Bis-[2,5-dithio-1,3,4-thiadiazole] corresponding to the following formula: ##STR1## is obtained by reacting 2,5-dimercapto-1,3,4-thiadiazole and hydrogen peroxide in the absence of other reactants.
Inventors
- 👤 Peter Hugo
- 👤 Rainer Noack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:13
CPC Classifications
C; C07; C07D; C07D513/00; C07D513/12; C07D513/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
7 words
Bis-[2,5-dithio-1,3,4-thiadiazole] corresponding to the following formula: ##STR4##
Claim 2
Dependent Claim
7 words
Bis-[2,5-dithio-1,3,4-thiadiazole] corresponding to the following formula: ##STR4##
Claim 3
Dependent Claim
46 words
A process for producing the compound claimed in claim 1, characterized in that 2,5-dimercapto-1,3,4-thiadiazole in water is reacted with hydrogen peroxide in the absence of other reactants at a temperature of up to 100° C. wherein the molar ratio of 2,5-dimercapto-1,3,4-thiadiazole to hydrogen peroxide is 1:1.
Claim 4
Dependent Claim
36 words
A process as claimed in claim 2, characterized in that 2,5-dimercapto-1,3,4-thiadiazole is intially introduced in the form of a suspension in water, followed by the addition of hydrogen peroxide or an aqueous solution of hydrogen peroxide.
Claim 5
Dependent Claim
35 words
A process as claimed in claim 2, characterized in that the molar ratio of 2,5-dimercapto-1,3,4-thiadiazole to H 2 O 2 is 1:1 and the reaction temperature is in the range from 20° to 50° C.
References Cited (Backward Citations)
GB1078538A
Cited
US3725362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-07 | 1990-01-06 | 1990-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-07 | 1994-01-06 | 1994-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-07 | 1998-01-06 | 1998-07-08 | $7700.00 | Window Closed / Lapsed |