US2560032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N,n'-piperazino bis-sulfenamides
Assignee: Bridgestone Firestone Inc
•
Filing: 1949-11-02
•
Granted: 1951-07-10
•
Expires: 1969-11-02
Abstract
No abstract record available.
Inventors
- 👤 Jr George E P Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:05
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/22; C07D295/26; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/38; C07D277/50; C07D277/52; C07D277/60; C07D277/62; C07D277/68; C07D277/70; C07D277/76; C07D277/80; C07D417/00; C07D417/14; C08; C08K; C08K5/00; C08K5/36; C08K5/43; C08K5/45; C08K5/46; C08K5/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A SULFENAMIDE OF THE FORMULA
Claim 2
Dependent Claim
5 words
A SULFENAMIDE OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |