US2804455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monoazo dyestuffs and their metal complex compounds
Assignee: Bayer AG
•
Filing: 1955-05-03
•
Granted: 1957-08-27
•
Expires: 1975-05-03
Abstract
No abstract record available.
Inventors
- 👤 Dorlars Alfons
- 👤 Bayer Otto
- 👤 Enders Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:26
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
DYESTUFFS SELECTED FROM THE GROUP CONSISTING OF MONOAZO DYESTUFFS CORRESPONDING TO THE GENERAL FORMULA
Claim 2
Dependent Claim
14 words
DYESTUFFS SELECTED FROM THE GROUP CONSISTING OF MONOAZO DYESTUFFS CORRESPONDING TO THE GENERAL 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) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |