US3828020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkoxyalkylamino salts of disazo acid dyes
Assignee: BASF SE
•
Filing: 1972-08-21
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Granted: 1974-08-06
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Expires: 1992-08-21
Abstract
Abstract SULFONIC ACID GROUPS-CONTAINING DISAZO COUPLING PRODUCTS OF AMINOAZOBENZENES AND B-NAPTHTHOLSULFONIC ACIDS IN THE FORM OF THEIR SALTS WITH ALIPHATIC AMINES CONTAINING ETHER LINKAGES. THE SALTS ARE USEFUUL FOR COLORING PRINTING INKS AND PARTICULARLY FOR COLORING POLYPROPYLENE.
Inventors
- 👤 A Tartter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:29
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02; C09B31/06; C09B31/068; C09B31/072; C09B69/00; C09B69/02; C09B69/04; C09B69/045
Claims Analysis
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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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |