US2970994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-insoluble phenylazoindole dyes
Assignee: Bayer AG
•
Filing: 1958-06-03
•
Granted: 1961-02-07
•
Expires: 1978-06-03
Abstract
No abstract record available.
Inventors
- 👤 Kruckenberg Winfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:36
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/10; C09B29/18; C09B29/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A WATER-INSOLUBLE MONOAZO DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
7 words
A WATER-INSOLUBLE MONOAZO DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
FR648068A
Cited
US2228288A
Cited
US2196757A
Cited
US2198002A
Cited
US2424493A
Cited
US2439798A
Cited
US2512251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |