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US2889316A
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Monoazo dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1955-07-25
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Granted: 1959-06-02
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Expires: 1975-07-25
Abstract
No abstract record available.
Inventors
- 👤 Heckendorn Alphonse
- 👤 Fasciati Alfred
- 👤 Zollinger Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:19
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A MONOAZO-DYESTYFF CONTAINING A SINGLE SULFONIC ACID GROUP AND CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
13 words
A MONOAZO-DYESTYFF CONTAINING A SINGLE SULFONIC ACID GROUP AND CORRESPONDING TO THE FORMULA
References Cited (Backward Citations)
US2374157A
Cited
US2722527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |