Patent US2785040A successfully refreshed from Google Patents.
US2785040A
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Process for dyeing cellulosic materials
Assignee: —
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Filing: —
•
Granted: 1957-03-12
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Expires: 1974-03-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:42
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/32; C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; D06P3/00; D06P3/58; D06P3/60; D06P3/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
PROCESS FOR DYEING CELLULOSE MATERIALS WITH METALLIZABLE DIRECT DYESTUFFS, WHICH FORM SPARINGLY SOLUBLE METAL COMPLEXES, BY ADDING AN AGENT YIELDING METAL TO A BATH CONTAINING AT LEAST A SMALL QUANTITY OF NON-METALLIZED DYESTUFF, WHICH PROCESS COMPRISES ADDING TO THE DYEBATH AN AGENT YIELDING A METAL HAVING AN ATOMIC NUMBER FROM 28 TO 29 AND CARRYING OUT THE METALLIZATION IN A NEUTRAL TO ALKALINE MEDIUM IN THE PRESENCE OF ANIONS OF A POLYPHOSPHORIC ACID AND IN THE ABSENCE OF AMINES.
Claim 2
Dependent Claim
79 words
PROCESS FOR DYEING CELLULOSE MATERIALS WITH METALLIZABLE DIRECT DYESTUFFS, WHICH FORM SPARINGLY SOLUBLE METAL COMPLEXES, BY ADDING AN AGENT YIELDING METAL TO A BATH CONTAINING AT LEAST A SMALL QUANTITY OF NON-METALLIZED DYESTUFF, WHICH PROCESS COMPRISES ADDING TO THE DYEBATH AN AGENT YIELDING A METAL HAVING AN ATOMIC NUMBER FROM 28 TO 29 AND CARRYING OUT THE METALLIZATION IN A NEUTRAL TO ALKALINE MEDIUM IN THE PRESENCE OF ANIONS OF A POLYPHOSPHORIC ACID AND IN THE ABSENCE OF AMINES.
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) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |