US2581936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction of substituted sulfenamides with ketones and use of reaction product in rubber vulcanization
Assignee: Bridgestone Firestone Inc
•
Filing: 1949-07-02
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Granted: 1952-01-08
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Expires: 1969-07-02
Abstract
No abstract record available.
Inventors
- 👤 Edward L Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:20
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/60; C07D277/62; C07D277/68; C07D277/70; C07D277/76; C07D277/80; C08; C08K; C08K5/00; C08K5/0008; C08K5/0025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A REACTION PRODUCT OF A KETONE AND A SULFENAMIDE HAVING AT LEAST ONE HYDROGEN ATOM ATTACHED TO THE AMIDO NITROGEN ATOM THEREOF AND SELECTED FROM THE GROUP CONSISTING OF THIAZOLINE, THIAZOLE AND THIOCARBAMYL SULFENAMIDES.
Claim 2
Dependent Claim
34 words
A REACTION PRODUCT OF A KETONE AND A SULFENAMIDE HAVING AT LEAST ONE HYDROGEN ATOM ATTACHED TO THE AMIDO NITROGEN ATOM THEREOF AND SELECTED FROM THE GROUP CONSISTING OF THIAZOLINE, THIAZOLE AND THIOCARBAMYL SULFENAMIDES.
References Cited (Backward Citations)
US2331749A
Cited
US2260380A
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US2339552A
Cited
US2419290A
Cited
US2476818A
Cited
US2441032A
Cited
US2476688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |