US3560476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic monoazo and disazo dyes containing hydroxyethyl hydrazinium groups
Assignee: Sandoz AG
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Filing: 1967-06-26
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Granted: 1971-02-02
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Expires: 1987-06-26
Abstract
Abstract BASIC DYES OF THE MONOAZO AND DISAZO SERIES CONTAINING AT LEAST ONE HYDRAZINIUM GROUP OF THE FORMULA: -Y-N(+)(-NH2)(-R1)-C2H4-OH CONNECTED TO A DYE RADICAL A, WHEREIN R1 IS METHYL, ETHYL OR HYDROXYMETHYL OR, TOGETHER WITH THE BRIDGE MEMBER Y AND THE DYE RADICAL A AND THE N-ATOM BOUND TO R1, IS: PIPERAZINE-1,4,4-TRIYL ARE EXCELLENT FOR DYEING, PADDING OR PRINTING ORLON AND RELATED MATERIALS.
Inventors
- 👤 Roland Entschel
- 👤 Curt Mueller
- 👤 Walter Wehrli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:09
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/28; B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; C08; C08K; C08K5/00; C08K5/0008; C08K5/0041; C08K5/16; C08K5/29; C09B1/32; C09B1/50; C09B1/501; C09B1/51; C09B1/54; C09B1/542; C09B44/00; C09B44/02; C09B51/00; C09B62/00; C09B62/44; C09B62/62; C09B62/66; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |