US3184471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1, 2'-bibenzotriazole compounds and their production
Assignee: EIDP Inc
•
Filing: 1963-01-17
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Granted: 1965-05-18
•
Expires: 1983-01-17
Abstract
No abstract record available.
Inventors
- 👤 Robert J Harder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:27
CPC Classifications
A; A61; A61Q; A61Q17/00; A61Q17/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/49; A61K8/494; A61K8/496; C; C06; C06B; C06B25/00; C06B25/04; C07; C07D; C07D249/00; C07D249/16; C07D249/18; G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
31 words
A PROCESS OF PREPARING 1,2''-BIBENZOTRIAZOLES WHICH COMPRISES: (A) PREPARING A 2-AMINOBENZOTRIAZOLE BY BOILING A MIXTURE OF HYDROXYLAMINE-O-SULFONIC ACID AND A BENZOTRIAZOLE DISSOLVED IN AQUEOUS ALKALI, SAID BENZOTRIAZOLE BEING OF THE FORMULA
Claim 4
Dependent Claim
31 words
A PROCESS OF PREPARING 1,2''-BIBENZOTRIAZOLES WHICH COMPRISES: (A) PREPARING A 2-AMINOBENZOTRIAZOLE BY BOILING A MIXTURE OF HYDROXYLAMINE-O-SULFONIC ACID AND A BENZOTRIAZOLE DISSOLVED IN AQUEOUS ALKALI, SAID BENZOTRIAZOLE BEING OF THE FORMULA
References Cited (Backward Citations)
US3496940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-17 | 1968-11-16 | 1969-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-17 | 1972-11-16 | 1973-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-17 | 1976-11-16 | 1977-05-18 | $7700.00 | Window Closed / Lapsed |