US3184472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1, 1'-bibenzotriazoles and their preparation
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
- 👤 Rudolph A Carboni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:34
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3472; C08K5/3475; C07; C07D; C07D249/00; C07D249/16; C07D249/18
Claims Analysis
Total Claims: 5
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
22 words
IN A METHOD OF PREPARING 1,1''-BIBENZOTRIAZOLES THE STEP WHICH COMPRISES REDUCING THE BISDIAZONIUM SALT PREPARED BY; TETRAAZOTIZING AN O,O''-DIAMINOAZOBENZENE OF THE FORMULA
Claim 4
Dependent Claim
22 words
IN A METHOD OF PREPARING 1,1''-BIBENZOTRIAZOLES THE STEP WHICH COMPRISES REDUCING THE BISDIAZONIUM SALT PREPARED BY; TETRAAZOTIZING AN O,O''-DIAMINOAZOBENZENE OF THE FORMULA
Claim 5
Dependent Claim
34 words
A METHOD OF PREPARING A DIBENZO-1,3A,4,6A-TETRAAZAPENTALENE WHICH COMPRISES HEATING A COMPOUND OF CLAIM 1 UP TO AT LEAST ITS MELTING POINT, WHEREUPON THE COMPOUND DECOMPOSES WITH LOSS OF NITROGEN TO FORM THE CORRESPONDING DIBENZO-1,3A,4,6A-TETRAZAPENTALENE.
References Cited (Backward Citations)
No citation records indexed.
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 |