US2785158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monoazo dyestuffs
Assignee: Bayer AG
•
Filing: 1953-07-21
•
Granted: 1957-03-12
•
Expires: 1973-07-21
Abstract
No abstract record available.
Inventors
- 👤 Enders Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:13
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/24; C09B29/28; C09B29/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
MONOAZO DYESTUFFS CORRESPONDING AS FREE ACIDS TO THE FORMULA
Claim 2
Dependent Claim
9 words
MONOAZO DYESTUFFS CORRESPONDING AS FREE ACIDS TO THE FORMULA
References Cited (Backward Citations)
US1824686A
Cited
US2273517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |