US3368992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of dispersing a fiber-forming polyamide and pigments in a dispersing medium
Assignee: BASF Schweiz AG
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Filing: 1959-08-07
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Granted: 1968-02-13
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Expires: 1979-08-07
Abstract
No abstract record available.
Inventors
- 👤 Altermatt Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:02
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C09; C09B; C09B67/00; C09B67/0071; C09B67/0092; C09B67/0095; D; D06; D06P; D06P1/00; D06P1/44; C08J2377/00; C08J2477/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR PRODUCING PREPARATIONS OF SOLID SUBSTANCES, COMPRISING HEATING FIBER-FORMING POLYAMIDE IN A CLOSED VESSEL AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 100-200*C. WITH A DISPERSION OF A PIGMENT IN THE PRESENCE OF A LIQUID SELECTED FROM THE GROUP CONSISTING OF WATER, FORMAMIDE, Y-BUTYRO-LACTONE, PYRIDINE AND DIMETHYL-SULFOXIDE, WITH THE EXCLUSION OF OXYGEN, UNTIL THE POLYAMIDE HAS DISSOLVED, AND COOLING THE RESULTING MIXTURE, AT LEAST 1 PART BY WEIGHT OF PIGMENT BEING USED FOR EVERY 10 PARTS BY WEIGHT OF POLYAMIDE.
Claim 2
Dependent Claim
82 words
A PROCESS FOR PRODUCING PREPARATIONS OF SOLID SUBSTANCES, COMPRISING HEATING FIBER-FORMING POLYAMIDE IN A CLOSED VESSEL AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 100-200*C. WITH A DISPERSION OF A PIGMENT IN THE PRESENCE OF A LIQUID SELECTED FROM THE GROUP CONSISTING OF WATER, FORMAMIDE, Y-BUTYRO-LACTONE, PYRIDINE AND DIMETHYL-SULFOXIDE, WITH THE EXCLUSION OF OXYGEN, UNTIL THE POLYAMIDE HAS DISSOLVED, AND COOLING THE RESULTING MIXTURE, AT LEAST 1 PART BY WEIGHT OF PIGMENT BEING USED FOR EVERY 10 PARTS BY WEIGHT OF POLYAMIDE.
References Cited (Backward Citations)
US2345533A
Cited
US2849414A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |