US2816101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chrome containing monoazo dyestuffs
Assignee: Bayer AG
•
Filing: 1954-04-14
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Granted: 1957-12-10
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Expires: 1974-04-14
Abstract
No abstract record available.
Inventors
- 👤 Breig Kurt
- 👤 Glietenberg Eugen
- 👤 Nussler Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:34
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
CHROME COMPLEX COMPOUNDS OF MONOAZO DYESTUFFS FREE FROM SULFONIC ACID GROUPS CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
15 words
CHROME COMPLEX COMPOUNDS OF MONOAZO DYESTUFFS FREE FROM SULFONIC ACID GROUPS 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) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |