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Patent US2650168A successfully refreshed from Google Patents.
US2650168A
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Method for dispersing an immiscible pigment in viscose solution
Assignee: Akzona Inc
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Filing: 1949-09-01
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Granted: 1953-08-25
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Expires: 1969-09-01
Abstract
No abstract record available.
Inventors
- 👤 Pieter Van Dijk
- 👤 Schrenk Hans Alwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:10
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/06; D01D1/065; B; B01; B01F; B01F25/00; B01F25/50; B01F25/51
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR UNIFORMLY DISPERSING AN IMMISCIBLE PIGMENT IN A VISCOSE SOLUTION WHICH COMPRISES CONTINUOUSLY INTRODUCING VISCOSE AND PIGMENT INTO AN INPUT ZONE, CONTINUOUSLY DELIVERING THE MIXTURE FROM THE INPUT ZONE TO A DISCHARGE ZONE, CONTINUOUSLY WITHDRAWING A PORTION OF SAID VISCOSE-PIGMENT MIXTURE FROM SAID DISCHARGE ZONE, CONTINUOUSLY RETURNING THE REMAINING PORTION FROM SAID DISCHANGE ZONE TO THE INPUT ZONE, AND DURING THE DELIVERY OF SAID MIXTURE FROM SAID INPUT ZONE TO SAID DISCHARGE ZONE INTO HOMOGENEITY OF SAID MIXTURE BY DIVIDING THE FLOW OF MIXTURE AT A POINT DOWNSTREAM FROM THE INPUT ZONE AND UPSTREAM FROM THE DISCHARGE ZONE INTO TWO STREAMS, AND RETURNING ONE OF SAID STREAMS TO A POINT UPSTREAM FROM THE POINT OF DIVISION BUT DOWNSTREAM FROM THE INPUT ZONE.
Claim 2
Dependent Claim
124 words
A PROCESS FOR UNIFORMLY DISPERSING AN IMMISCIBLE PIGMENT IN A VISCOSE SOLUTION WHICH COMPRISES CONTINUOUSLY INTRODUCING VISCOSE AND PIGMENT INTO AN INPUT ZONE, CONTINUOUSLY DELIVERING THE MIXTURE FROM THE INPUT ZONE TO A DISCHARGE ZONE, CONTINUOUSLY WITHDRAWING A PORTION OF SAID VISCOSE-PIGMENT MIXTURE FROM SAID DISCHARGE ZONE, CONTINUOUSLY RETURNING THE REMAINING PORTION FROM SAID DISCHANGE ZONE TO THE INPUT ZONE, AND DURING THE DELIVERY OF SAID MIXTURE FROM SAID INPUT ZONE TO SAID DISCHARGE ZONE INTO HOMOGENEITY OF SAID MIXTURE BY DIVIDING THE FLOW OF MIXTURE AT A POINT DOWNSTREAM FROM THE INPUT ZONE AND UPSTREAM FROM THE DISCHARGE ZONE INTO TWO STREAMS, AND RETURNING ONE OF SAID STREAMS TO A POINT UPSTREAM FROM THE POINT OF DIVISION BUT DOWNSTREAM FROM THE INPUT ZONE.
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) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |