US3637648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactive monazo-dyestuffs
Assignee: Hoechst AG
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Filing: 1968-07-09
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Granted: 1972-01-25
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Expires: 1988-07-09
Abstract
Abstract REACTIVE MONOAZO DYESTUFFS CONTAINING AS REACTIVE GROUPINGS ONE OR TWO GROUPS OF THE FORMULA -N(-R'')-SO2-Y WHEREIN Y REPRESENTS ONE OF THE MOIETIES PHENYL-O-CH2-CH2-CH2-COO-CH2-CH2- PHENYL-N(+)-CH2-CH2- CL(-), -CH2-CH2-N(+)(-LOWER ALKYL)3 CL(-) AND -CH=CH2, AND R'' IS LOWER ALKYL OR BENZYL, WHICH ARE SUITABLE FOR THE DYEING OR PRINTING OF LEATHER, WOOL, SILK, TEXTILE MATERIALS OF POLYAMIDES, POLYACTYLONITRILE, POLYURETHANES OR CELLULOSE.
Inventors
- 👤 Rudolf Kuhne
- 👤 Fritz Meininger
- 👤 Heinrich Frolich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:08
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/523; C09B62/527; C09B62/53; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/918
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |