US2791579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water insoluble thiodiazole monoazo dyestuffs
Assignee: Bayer AG
•
Filing: 1954-04-06
•
Granted: 1957-05-07
•
Expires: 1974-04-06
Abstract
No abstract record available.
Inventors
- 👤 Taube Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:16
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/0025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
MONOAZO DYESTUFFS FREE FROM SULFONIC AND CARBOXYLIC ACID GROUPS CORRESPONDING TO THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
15 words
MONOAZO DYESTUFFS FREE FROM SULFONIC AND CARBOXYLIC ACID GROUPS CORRESPONDING TO THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
DE842346C
Cited
US2659719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |