US3708596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disazo dyestuffs
Assignee: Hoechst AG
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Filing: 1970-12-16
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Granted: 1973-01-02
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Expires: 1990-12-16
Abstract
Abstract DISAZO DYESTUFFS OF THE GENERAL FORMULA 1-(PHENYL-N=N-),4-((4-(HO-A-O-)PHENYL)-N=N-)NAPHTHALENE WHEREIN A IS AN ALKYLENE GROUP, WHICH DYESTUFFS GIVE ORANGE SHADES AND ARE USED FOR DYEING AND PRINTING TEXTILE FIBROUS MATRIALS, ESPECIALLY POLYETHYLENE GLYCOL TEREPHTHALATES.
Inventors
- 👤 W Happe
- 👤 H Schladetsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 21:58
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/28; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |