US2908678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-insoluble 6-amino-2, 4-dioxo-tetrahydroquinazoline monoazo dyestuffs
Assignee: Bayer AG
•
Filing: 1957-01-16
•
Granted: 1959-10-13
•
Expires: 1977-01-16
Abstract
No abstract record available.
Inventors
- 👤 Goebel Hermann
- 👤 Muller Gerd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:29
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/10; C09B29/18; C09B29/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
WATER-INSOLUBLE MONOAZO DYESTUFFS CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
7 words
WATER-INSOLUBLE MONOAZO DYESTUFFS CORRESPONDING TO THE FORMULA
References Cited (Backward Citations)
US1012055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |