US3737438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-(2-formylpropylthio(2))-imides
Assignee: Bayer AG
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Filing: 1971-02-01
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Granted: 1973-06-05
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Expires: 1991-02-01
Abstract
Abstract THIS INVENTION RELATES TO NEW SULPHENAMIDES OF 2-FORMYL PROPYL-2-SULPHENIC ACID AND TO THEIR USE IN THE PRODUCTION AND PROCESSING OF MIXTURES BASED ON A NATURAL OR SYNTHETIC RUBBER. THE NOVEL COMPOUNDS ARE PREPARED BY REACTING 2-FORMYL PROPYL-2-SULPHENIC CHLORIDE WITH AMINES AND AMIDES IN THE PRESENCE OF AN ACID BINDING AGENT. THE RETARDERS CAN BE MIXED INTO THE RUBBER IN THE USUAL WAY.
Inventors
- 👤 E Roos
- 👤 M Abele
- 👤 R Nast
- 👤 T Kempermann
- 👤 R Schubart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:27
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/22; C07D295/26; C07D207/00; C07D207/46; C07D207/48; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C07D223/00; C07D223/02; C07D223/06; C07D223/08; C07D223/10; C07D275/00; C07D275/04; C07D275/06; C08; C08K; C08K5/00; C08K5/36; C08K5/43; C08K5/44
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |