Patent US2817656A successfully refreshed from Google Patents.
US2817656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of coppering disazo dyestuffs
Assignee: Honeywell International Inc
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Filing: 1953-08-03
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Granted: 1957-12-24
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Expires: 1973-08-03
Abstract
No abstract record available.
Inventors
- 👤 Don W Bissell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:00
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/08; C09B45/00; C09B45/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THE PROCESS OF PRODUCING A COPPER-CONTAINING DISAZO DYESTUFF WHICH COMPRISES HEATING A BLUE UNSYMMETRICAL DISAZO DYESTUFF WHICH IS A 3,3''-DIMETHOXY-4,4''-BIS(HYDROXYSULFO-NAPHTHYLAZO)-BIPHENYL IN WHICH ONE OF THE HYDROXYSULFO-NAPHTHYLAZO RADICALS IS 2-AZO-1-HYDROXY-6-PHENYLAMINO-3-SULFO-NAPHTHALENE AND THE OTHER HYDROXY-SULFO NAPHTHYLAZO RADICAL IS AN AZO-SULFO-NAPHTHOL CONTAINING A SINGLE HYDROXYL GROUP ORTHO TO THE AZO GROUP AND NOT MORE THAN TWO SULFO GROUPS AS THE SOLE SUBSTITUENT WITH A WATER-SOLUBLE COPPER TETRAMINE COMPOUND IN AN AQUEOUS REACTION MEDIUM CONTAINING FREE MORPHOLINE IN AN AMOUNT EQUAL TO 3% TO 20% OF THE TOTAL WEIGHT OF MORPHOLINE AND WATER IN THE REACTION MEDIUM, WHEREBY THE ALKYL GROUPS OF THE ALKOXY RADICALS ARE SPLIT OFF AND A COPPERCONTAINING DYESTUFF IS FORMED.
Claim 2
Dependent Claim
110 words
THE PROCESS OF PRODUCING A COPPER-CONTAINING DISAZO DYESTUFF WHICH COMPRISES HEATING A BLUE UNSYMMETRICAL DISAZO DYESTUFF WHICH IS A 3,3''-DIMETHOXY-4,4''-BIS(HYDROXYSULFO-NAPHTHYLAZO)-BIPHENYL IN WHICH ONE OF THE HYDROXYSULFO-NAPHTHYLAZO RADICALS IS 2-AZO-1-HYDROXY-6-PHENYLAMINO-3-SULFO-NAPHTHALENE AND THE OTHER HYDROXY-SULFO NAPHTHYLAZO RADICAL IS AN AZO-SULFO-NAPHTHOL CONTAINING A SINGLE HYDROXYL GROUP ORTHO TO THE AZO GROUP AND NOT MORE THAN TWO SULFO GROUPS AS THE SOLE SUBSTITUENT WITH A WATER-SOLUBLE COPPER TETRAMINE COMPOUND IN AN AQUEOUS REACTION MEDIUM CONTAINING FREE MORPHOLINE IN AN AMOUNT EQUAL TO 3% TO 20% OF THE TOTAL WEIGHT OF MORPHOLINE AND WATER IN THE REACTION MEDIUM, WHEREBY THE ALKYL GROUPS OF THE ALKOXY RADICALS ARE SPLIT OFF AND A COPPERCONTAINING DYESTUFF IS FORMED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |