Patent US3079389A successfully refreshed from Google Patents.
US3079389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthraquinone vat dyestuffs derived from 1-aminoanthraquinone-2-carboxylic esters
Assignee: BASF Schweiz AG
•
Filing: 1959-11-16
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Granted: 1963-02-26
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Expires: 1979-11-16
Abstract
No abstract record available.
Inventors
- 👤 Kern Walter
- 👤 Koch Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:24
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/022; C09B62/024
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
7 words
AN ANTHRAQUINONE VAT DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
7 words
AN ANTHRAQUINONE VAT DYESTUFF OF THE FORMULA
Claim 3
Dependent Claim
6 words
THE ANTRHRAQUINONE DYESTUFF OF THE FORMULA
Claim 4
Dependent Claim
6 words
THE ANTRHRAQUINONE DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US1966125A
Cited
US2132829A
Cited
US2598587A
Cited
GB680857A
Cited
FR1022168A
Cited
US2870172A
Cited
GB808603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |