US3385843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble yellow monoazo pyrazolone dye
Assignee: Hoechst AG
•
Filing: 1965-12-03
•
Granted: 1968-05-28
•
Expires: 1985-12-03
Abstract
No abstract record available.
Inventors
- 👤 Remy Hermann
- 👤 Wenghofer Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:32
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/503; C09B62/507; C09B62/51
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
THE WATER-SOLUBLE YELLOW MONOAZO-DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
7 words
THE WATER-SOLUBLE YELLOW MONOAZO-DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
GB973569A
Cited
US3234207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |