US2750250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for dyeing polyacrylonitrile fabrics
Assignee: EIDP Inc
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Filing: 1952-03-13
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Granted: 1956-06-12
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Expires: 1972-03-13
Abstract
No abstract record available.
Inventors
- 👤 Lindenstruth Albert Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:52
CPC Classifications
D; D06; D06P; D06P7/00; D06P7/005; D06P3/00; D06P3/70; D06P3/74; D06P3/76; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR DYEING A TEXTILE PRODUCED FROM POLYACRYLONITRILE WHICH COMPRISES THE STEPS OF SCOURING THE SAID TEXTILE IN THE PRESENCE OF A DETERGENT TO REMOVE FOREIGN MATTER FROM ITS SURFACE, IMMERSING THE SAID TEXTILE FOR AT LEAST ABOUT ONE HOUR IN BOILING WATER CONTAINING FROM ABOUT 0.1 TO ABOUT 0.2% OF A SULFATE OF AN ALIPHATIC ALCOHOL CONTAINING FROM TEN TO EIGHTEEN CARBON ATOMS AND FROM ABOUT 1 TO ABOUT 2% OF A LOW MOLECULAR WEIGHT CARBOXYLIC ACID, RINSING THE SAID TEXTILE WITH WATER, DRYING THE SAID TEXTILE, SUBJECTING THE SAID TEXTILE TO A STRESS OF AT LEAST ABOUT TWO POUNDS PER SQUARE INCH AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 300* TO ABOUT 500* F. AND THEREAFTER APPLYING A DYE.
Claim 2
Dependent Claim
124 words
A PROCESS FOR DYEING A TEXTILE PRODUCED FROM POLYACRYLONITRILE WHICH COMPRISES THE STEPS OF SCOURING THE SAID TEXTILE IN THE PRESENCE OF A DETERGENT TO REMOVE FOREIGN MATTER FROM ITS SURFACE, IMMERSING THE SAID TEXTILE FOR AT LEAST ABOUT ONE HOUR IN BOILING WATER CONTAINING FROM ABOUT 0.1 TO ABOUT 0.2% OF A SULFATE OF AN ALIPHATIC ALCOHOL CONTAINING FROM TEN TO EIGHTEEN CARBON ATOMS AND FROM ABOUT 1 TO ABOUT 2% OF A LOW MOLECULAR WEIGHT CARBOXYLIC ACID, RINSING THE SAID TEXTILE WITH WATER, DRYING THE SAID TEXTILE, SUBJECTING THE SAID TEXTILE TO A STRESS OF AT LEAST ABOUT TWO POUNDS PER SQUARE INCH AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 300* TO ABOUT 500* F. AND THEREAFTER APPLYING A DYE.
References Cited (Backward Citations)
FR905038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |