US3380989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper-containing dis-, tris- and tetrakisazo dyestuffs of resorcin with beta-oxyethylsulfone-sulfuric acid ester groups
Assignee: Hoechst AG
•
Filing: 1964-10-16
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Granted: 1968-04-30
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Expires: 1984-10-16
Abstract
No abstract record available.
Inventors
- 👤 Remy Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:26
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/503; C09B62/507; C09B62/515; C09D; C09D167/00; C09D167/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3135730A
Cited
US3135779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |