US3560430A
Expired / Lapsed
US
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Process and apparatus for mixing a pigment dispersion into a polyamide melt
Assignee: Glanzstoff AG
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Filing: 1968-11-20
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Granted: 1971-02-02
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Expires: 1988-11-20
Abstract
Abstract PROCESS AND APPARATUS FOR THE UNIFORM MIXING OF A POLYAMIDE MELT WITH A PIGMENT DISPERSED IN A LIQUID MEDIUM SOLUBLE IN THE POLYAMIDE WHEREIN THE MELT IS DIVIDED, IMMEDIATELY AFTER INTRODUCTION OF THE LIQUID PIGMENT DISPERSION AS A THIN LIQUID STREAM, INTO PLANAR SEGMENTS OR DISPLACED LAYERS HAVING A MAXIMUM THICKNESS OF ABOUT 1500 MICRONS, PREFERABLY 20 TO 850 MICRONS, USING A PADDLE WHEEL STIRRING MECHANISM AT THE INLET END OF AN ELONGATED MIXING VESSEL TAPERING RADIALLY INWARDLY DOWN TO ITS OUTLET OR DISCHARGE END.
Inventors
- 👤 Ernst Meyer
- 👤 Wolfgang Grimm
- 👤 Klaus Gerlach
- 👤 Helmut Linhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:07
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/2053; C08J3/2056; B; B01; B01F; B01F27/00; B01F27/50; B29; B29B; B29B13/00; B29B13/02; B29B13/022; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/80; B29B7/88; B29B7/94; C08J3/201; D; D01; D01D; D01D1/00; D01D1/06; D01D1/065; B01F23/00; B01F23/40; B01F23/47; B01F23/471; B29K; B29K2105/00; B29K2105/0005; B29K2105/0032; C08J2377/00
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |