US2816885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chrome-containing monoazo dyestuffs
Assignee: Bayer AG
•
Filing: 1955-01-05
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Granted: 1957-12-17
•
Expires: 1975-01-05
Abstract
No abstract record available.
Inventors
- 👤 Dittmar Gerhard
- 👤 Putter Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:21
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
CHROMIUM COMPLEX COMPOUNDS OF MONCAZO DYESTUFFS CORRESPONDING TO THE FOLLOWING FORMULA
Claim 2
Dependent Claim
11 words
CHROMIUM COMPLEX COMPOUNDS OF MONCAZO DYESTUFFS CORRESPONDING TO THE FOLLOWING 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) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |