US3441554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thiadiazole monoazo dyes
Assignee: BASF SE
•
Filing: 1966-11-22
•
Granted: 1969-04-29
•
Expires: 1986-11-22
Abstract
No abstract record available.
Inventors
- 👤 Erwin Hahn
- 👤 Hans Guenter Wippel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:53
CPC Classifications
C; C07; C07D; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/08; C09; C09B; C09B29/00; C09B29/0025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A DYE HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
6 words
A DYE HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US3221006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |