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US3671503A
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US
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Vulcanization retarders
Assignee: Bayer AG
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Filing: 1970-11-18
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Granted: 1972-06-20
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Expires: 1990-11-18
Abstract
Abstract N,N''-thio-bis-carbamic acid amides, their preparation by reacing at least 2 mols of a carboxylic acid amide with 1 mol of sulphur dichloride in the presence of an acid binding agent and their utility as rubber vulcanization retarders.
Inventors
- 👤 Rudiger Schubart
- 👤 Ernst Roos
- 👤 Manfred Abele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/43
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
12 words
The process of claim 1 wherein said vulcanization retarder is N,N''-thio-bis-(N-phenyl acetamide).
Claim 2
Dependent Claim
11 words
The process of claim 1 wherein said vulcanization retarder is N,N''-thio-bis-(pyrrolidone-2).
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein said vulcanization retarder is N,N''-thio-bis-(caprolactam).
References Cited (Backward Citations)
US3546185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |