US3345356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing aromatic azo compounds
Assignee: Columbian Carbon Co
•
Filing: 1963-11-29
•
Granted: 1967-10-03
•
Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 James E Kmiecik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:58
CPC Classifications
C; C07; C07C; C07C241/00; C07C241/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A METHOD FOR PREPARING AN AROMATIC AZO COMPOUND WHICH COMPRISES CONTACTING AT A TEMPERATURE OF FROM ABOUT 100*C. TO 1,000*C. A NITROAROMATIC COMPOUND OF THE FORMULA
Claim 2
Independent Claim
26 words
A METHOD FOR PREPARING AN AROMATIC AZO COMPOUND WHICH COMPRISES CONTACTING AT A TEMPERATURE OF FROM ABOUT 100*C. TO 1,000*C. A NITROAROMATIC COMPOUND OF THE FORMULA
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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |