US2851452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing diazoamino
Assignee: —
•
Filing: —
•
Granted: 1958-09-09
•
Expires: 1975-09-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:40
CPC Classifications
C; C09; C09B; C09B39/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
IN THE PROCESS FOR PREPARING A DIAZOAMINO COMPOUND OBTAINED FROM A DIAZOTIZED WEAKLY NEGATIVELY SUBSTITUTED AROMATIC AMINE OF THE BENZENE SERIES WITHOUT WATER SOLUBILIZING GROUPS AND A LOWER ALKYLAMINO-SULFOBENZOIC ACID AS STABILIZER THE IMPROVEMENT WHICH COMPRISES PRECIPITATING THE DIAZOAMINO COMPOUND AS ALKALINEEARTH METAL SALT OF THE GROUP CONSISTING OF CALCIUM, STRONTIUM AND BARIUM SALTS.
Claim 2
Dependent Claim
54 words
IN THE PROCESS FOR PREPARING A DIAZOAMINO COMPOUND OBTAINED FROM A DIAZOTIZED WEAKLY NEGATIVELY SUBSTITUTED AROMATIC AMINE OF THE BENZENE SERIES WITHOUT WATER SOLUBILIZING GROUPS AND A LOWER ALKYLAMINO-SULFOBENZOIC ACID AS STABILIZER THE IMPROVEMENT WHICH COMPRISES PRECIPITATING THE DIAZOAMINO COMPOUND AS ALKALINEEARTH METAL SALT OF THE GROUP CONSISTING OF CALCIUM, STRONTIUM AND BARIUM SALTS.
References Cited (Backward Citations)
US2168800A
Cited
US2522838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |