US2567796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble aminostilbene derivatives and process
Assignee: BASF Schweiz AG
•
Filing: 1948-11-16
•
Granted: 1951-09-11
•
Expires: 1968-11-16
Abstract
No abstract record available.
Inventors
- 👤 Ackermann Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:22
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/13; C07C309/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A PROCESS FOR THE MANUFACTURE OF A WATERSOLUBLE DERIVATIVE OF AN AMINOSTILBENE, WHICH COMPRISES REACTING AN AMINOSTILBENE OF THE GENERAL FORMULA
Claim 2
Dependent Claim
21 words
A PROCESS FOR THE MANUFACTURE OF A WATERSOLUBLE DERIVATIVE OF AN AMINOSTILBENE, WHICH COMPRISES REACTING AN AMINOSTILBENE OF THE GENERAL 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) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |