US2690398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigment preparations and process of making same
Assignee: BASF Schweiz AG
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Filing: 1950-06-12
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Granted: 1954-09-28
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Expires: 1970-06-12
Abstract
No abstract record available.
Inventors
- 👤 Guertler Peter
- 👤 Ruperti Andreas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:05
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/006
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
129 words
A DRY PIGMENT PREPARATION SUITABLE FOR DIRECT INCORPORATION INTO VISCOSE SOLUTION, WHICH PREPARATION CONTAINS PIGMENT IN A DISPERSIBLE FORM TO YIELD ON MIXING WITH WATER A DISPERSION WHEREIN THE MAJORITY OF THE PIGMENT PARTICLES HAVE A SIZE OF LESS THAN 5$, A QUANTITY OF WATER-SOLUBLE ANIONIC DISPERSING AGENT RANGING FROM 20 TO LESS THAN 75 PER CENT OF THE TOTAL DRY WEIGHT, AND ALSO BETWEEN 2 AND 20 PER CENT OF THE SAID DRY WEIGHT OF SUCH ETHER ACID SALT OF A HIGH POLYMERIC CARBOHYDRATE AS IN 3 PER CENT AQUEOUS SOLUTION POSSESSES A VISCOSITY OF AT LEAST 0.5 POISE AT 25* C. AND WHOSE ETHER ACID GROUPS ARE SELECTED FROM THE CLASS CONSISTING OF -O-ALKYLENE-COOH AND -O-ALKYLENE-SO3H GROUPS WHEREIN THE ALKYLENE RADICAL CONTAINS LESS THAN FOUR CARBON ATOMS.
Claim 2
Dependent Claim
129 words
A DRY PIGMENT PREPARATION SUITABLE FOR DIRECT INCORPORATION INTO VISCOSE SOLUTION, WHICH PREPARATION CONTAINS PIGMENT IN A DISPERSIBLE FORM TO YIELD ON MIXING WITH WATER A DISPERSION WHEREIN THE MAJORITY OF THE PIGMENT PARTICLES HAVE A SIZE OF LESS THAN 5$, A QUANTITY OF WATER-SOLUBLE ANIONIC DISPERSING AGENT RANGING FROM 20 TO LESS THAN 75 PER CENT OF THE TOTAL DRY WEIGHT, AND ALSO BETWEEN 2 AND 20 PER CENT OF THE SAID DRY WEIGHT OF SUCH ETHER ACID SALT OF A HIGH POLYMERIC CARBOHYDRATE AS IN 3 PER CENT AQUEOUS SOLUTION POSSESSES A VISCOSITY OF AT LEAST 0.5 POISE AT 25* C. AND WHOSE ETHER ACID GROUPS ARE SELECTED FROM THE CLASS CONSISTING OF -O-ALKYLENE-COOH AND -O-ALKYLENE-SO3H GROUPS WHEREIN THE ALKYLENE RADICAL CONTAINS LESS THAN FOUR CARBON ATOMS.
Claim 3
Dependent Claim
22 words
THE PROCESS FOR COLORING VISCOSE SOLUTION WHICH COMPRISES DIRECTLY INCORPORATING INTO VISCOSE SOLUTION A DRY PIGMENT PREPARATION ACCORD ING TO CLAIM 1.
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) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |