Patent US3051696A successfully refreshed from Google Patents.
US3051696A
Expired / Lapsed
US
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Chromation of azo dyes
Assignee: EIDP Inc
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Filing: 1960-03-23
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Granted: 1962-08-28
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Expires: 1980-03-23
Abstract
No abstract record available.
Inventors
- 👤 Dettwyler William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:47
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN THE PROCESS OF PRODUCING A 1:2 CHROMIUM-AZO DYE IN SUBSTANCE BY CHROMATING AN O,O-DIHYDROXYMONOAZO DRY, THE IMPROVEMENT WHICH CONSISTS OF APPLYING AS CHROMATING AGENT A WATER-SOLUBLE INORGANIC COMPOUND OF HEXAVALENT CHROMIUM IN QUANTITY NOT LESS THAN THEORETICAL BASED ON THE QUANTITY OF SAID MONOAZO DYE, AND EFFECTING THE CHROMATION IN AN AQUEOUS MEDIUM, AT A TEMPERATURE NOT LESS THAN 80*C., AND IN THE PRESENCE OF A WATER-SOLUBLE ALKANOLAMINE WHICH POSSESSES NOT MORE THAN 4 C-ATOMS IN ANY OF ITS ALKYL RADICALS AND WHICH IS PRESENT IN QUANTITY OF NOT LESS THAN 2 MOLES PER MOLE OF SAID MONOAZO DYE.
Claim 2
Dependent Claim
100 words
IN THE PROCESS OF PRODUCING A 1:2 CHROMIUM-AZO DYE IN SUBSTANCE BY CHROMATING AN O,O-DIHYDROXYMONOAZO DRY, THE IMPROVEMENT WHICH CONSISTS OF APPLYING AS CHROMATING AGENT A WATER-SOLUBLE INORGANIC COMPOUND OF HEXAVALENT CHROMIUM IN QUANTITY NOT LESS THAN THEORETICAL BASED ON THE QUANTITY OF SAID MONOAZO DYE, AND EFFECTING THE CHROMATION IN AN AQUEOUS MEDIUM, AT A TEMPERATURE NOT LESS THAN 80*C., AND IN THE PRESENCE OF A WATER-SOLUBLE ALKANOLAMINE WHICH POSSESSES NOT MORE THAN 4 C-ATOMS IN ANY OF ITS ALKYL RADICALS AND WHICH IS PRESENT IN QUANTITY OF NOT LESS THAN 2 MOLES PER MOLE OF SAID MONOAZO DYE.
References Cited (Backward Citations)
US1693448A
Cited
US2054489A
Cited
US2353411A
Cited
US2714102A
Cited
DE1016866B
Cited
GB793136A
Cited
US2842536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |