US2917504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetrakisazo dyestuffs
Assignee: Bayer AG
•
Filing: 1955-08-04
•
Granted: 1959-12-15
•
Expires: 1975-08-04
Abstract
No abstract record available.
Inventors
- 👤 Bockmann Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:48
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/12; C09B43/136; C09B43/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
TETRAKISAZO DYESTUFFS CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
6 words
TETRAKISAZO DYESTUFFS CORRESPONDING TO THE 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) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |