Patent US4468539A successfully refreshed from Google Patents.
US2990291A
Expired / Lapsed
US
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Process of preparing pigment delustered cellulose acetate yarn
Assignee: EIDP Inc
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Filing: 1960-06-22
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Granted: 1961-06-27
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Expires: 1980-06-22
Abstract
No abstract record available.
Inventors
- 👤 Bartholomay Henry William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:43
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; D; D01; D01D; D01D1/00; D01D1/06; D01D1/065; D01F; D01F1/00; D01F1/02; D01F1/04; D01F2/00; D01F2/24; D01F2/28; C08J2333/00; C08J2333/18; C08J2333/20; C08J2433/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
IN THE PROCESS OF DISPERSING HARD, WHITE, INORGANIC PIGMENT IN CELLULOSE ACETATE SPRINNING SOLUTION AND SPINNING THE SOLUTION TO FORM DELUSTERED CELLULOSE ACETATE YARN, THE IMPROVEMENT FOR REDUCING THE ABRASIVENESS OF THE RESULTING YARN WHICH COMPRISES AND GRINDING A SLURRY OF THE INORGANIC PIGMENT IN AN ACETONE SOLUTION OF CELLULOSE ACETATE, CONTAINING 10-40 PARTS BY WEIGHT OF PIGMENT AND 2-6 PARTS OF CELLULOSE ACETATE PER 100 PARTS OF SLURRY, BY HIGH SPEED AGITATION WITH AN AMOUNT OF 20-40 MESH SAND WHICH PROVIDES AN AVERAGE LIQUID DISTANCE BETWEEN SAND GRANULES IN THE SLURRY OF 0.5-2.0 MILLIMETERS AND THEN SEPARATING THE SAND TO PRODUCE A PIGMENT DISPERSION OF 0.1-1.0 MICRON PARTICLE SIZE HAVING A VISCOSITY OF 1 TO 30 POISES, AND INTIMATELY MIXING THIS INITIAL DISPERSION WITH AT LEAST 10 TIMES ITS WEIGHT OF AN ACETONE SOLUTION OF CELLULOSE ACETATE HAVING AT LEAST 4 TIMES GREATER CONCENTRATION OF CELLULOSE ACETATE THAN THAT OF THE INITIAL DISPERSION TO PROVIDE A SPINNING SOLUTION SUITABLE FOR EXTRUSION TO FORM DELUSTERED FILMANENTS.
Claim 2
Dependent Claim
166 words
IN THE PROCESS OF DISPERSING HARD, WHITE, INORGANIC PIGMENT IN CELLULOSE ACETATE SPRINNING SOLUTION AND SPINNING THE SOLUTION TO FORM DELUSTERED CELLULOSE ACETATE YARN, THE IMPROVEMENT FOR REDUCING THE ABRASIVENESS OF THE RESULTING YARN WHICH COMPRISES AND GRINDING A SLURRY OF THE INORGANIC PIGMENT IN AN ACETONE SOLUTION OF CELLULOSE ACETATE, CONTAINING 10-40 PARTS BY WEIGHT OF PIGMENT AND 2-6 PARTS OF CELLULOSE ACETATE PER 100 PARTS OF SLURRY, BY HIGH SPEED AGITATION WITH AN AMOUNT OF 20-40 MESH SAND WHICH PROVIDES AN AVERAGE LIQUID DISTANCE BETWEEN SAND GRANULES IN THE SLURRY OF 0.5-2.0 MILLIMETERS AND THEN SEPARATING THE SAND TO PRODUCE A PIGMENT DISPERSION OF 0.1-1.0 MICRON PARTICLE SIZE HAVING A VISCOSITY OF 1 TO 30 POISES, AND INTIMATELY MIXING THIS INITIAL DISPERSION WITH AT LEAST 10 TIMES ITS WEIGHT OF AN ACETONE SOLUTION OF CELLULOSE ACETATE HAVING AT LEAST 4 TIMES GREATER CONCENTRATION OF CELLULOSE ACETATE THAN THAT OF THE INITIAL DISPERSION TO PROVIDE A SPINNING SOLUTION SUITABLE FOR EXTRUSION TO FORM DELUSTERED FILMANENTS.
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) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |