US2734793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing water-dispersible
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
•
Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:53
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/02; D06P1/12; C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0079; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921; Y10S8/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A METHOD OF PREPARING DYEING COMPOSITIONS YIELDING AQUEOUS DISPERSIONS SUITABLE FOR COLORATION OF CELLULOSE ESTER, CELLULOSE ETHER AND SUPERPOLYAMIDE FIBERS, WHICH COMPRISES SUBJECTING A HEAVY AQUEOUS PASTE CONTAINING A SUBSTANTIALLY WATER-INSOLUBLE DIAZOTIZABLE AROMATIC AMINE, AND FOR EACH PART BY WEIGHT THEREOF, FROM 1/2 TO 3 PARTS OF A DISPERSING AGENT WHICH IS AN ACID-STABLE WATER-SOLUBLE MAGNESIUM LIGNOSULFONATE, TO MILLING SO AS TO SUBJECT THE PARTICLES OF SAID AMINE TO VIGOROUS SHEARING ACTION IN THE PASTE FOR 1/2 TO 5 HOURS.
Claim 2
Independent Claim
80 words
A METHOD OF PREPARING DYEING COMPOSITIONS YIELDING AQUEOUS DISPERSIONS SUITABLE FOR COLORATION OF CELLULOSE ESTER, CELLULOSE ETHER AND SUPERPOLYAMIDE FIBERS, WHICH COMPRISES SUBJECTING A HEAVY AQUEOUS PASTE CONTAINING A SUBSTANTIALLY WATER-INSOLUBLE DIAZOTIZABLE AROMATIC AMINE, AND FOR EACH PART BY WEIGHT THEREOF, FROM 1/2 TO 3 PARTS OF A DISPERSING AGENT WHICH IS AN ACID-STABLE WATER-SOLUBLE MAGNESIUM LIGNOSULFONATE, TO MILLING SO AS TO SUBJECT THE PARTICLES OF SAID AMINE TO VIGOROUS SHEARING ACTION IN THE PASTE FOR 1/2 TO 5 HOURS.
References Cited (Backward Citations)
US1236868A
Cited
US1908993A
Cited
US1828592A
Cited
US1917443A
Cited
US2115136A
Cited
US2181800A
Cited
US2574597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |