Patent US2992062A successfully refreshed from Google Patents.
US2992062A
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Dyeing synthetics with soluble leuco ester salts
Assignee: GAF Chemicals Corp
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Filing: 1955-11-25
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Granted: 1961-07-11
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Expires: 1975-11-25
Abstract
No abstract record available.
Inventors
- 👤 Henry R Mautner
- 👤 David I Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:31
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/60; D06P1/22; D06P1/28; D06P1/64; D06P1/642; D06P1/649; D06P1/6495; D06P1/655; D06P1/66; D06P3/00; D06P3/34; D06P3/52; D06P3/523; D06P3/70; D06P3/701; Y; Y10; Y10S; Y10S8/00; Y10S8/907
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
74 words
AN AQUEOUS DYEBATH CONTAINING A SULFURIC ACID ESTER SALT OF A LEUCO VAT DYESTUFF AND, BY WEIGHT, ABOUT 4 TO 8% OF A WATER-SOLUBLE NONIONIC SURFACE ACTIVE AGENT CONTAINING A POLYOXYETHYLENE CHAIN AND DERIVED FROM A COMPOUND CONTAINING AT LEAST 10 CARBON ATOMS AND A REACTIVE HYDROGEN ATOM, AND ABOUT 0.4 TO 1.5% OF A WATER-SOLUBLE CATIONIC SURFACE ACTIVE QUATERNARY AMMONIUM COMPOUND CONTAINING AN ALIPHATIC HYDROCARBON RADICAL OF FROM 8 TO 18 CARBON ATOMS.
Claim 2
Dependent Claim
74 words
AN AQUEOUS DYEBATH CONTAINING A SULFURIC ACID ESTER SALT OF A LEUCO VAT DYESTUFF AND, BY WEIGHT, ABOUT 4 TO 8% OF A WATER-SOLUBLE NONIONIC SURFACE ACTIVE AGENT CONTAINING A POLYOXYETHYLENE CHAIN AND DERIVED FROM A COMPOUND CONTAINING AT LEAST 10 CARBON ATOMS AND A REACTIVE HYDROGEN ATOM, AND ABOUT 0.4 TO 1.5% OF A WATER-SOLUBLE CATIONIC SURFACE ACTIVE QUATERNARY AMMONIUM COMPOUND CONTAINING AN ALIPHATIC HYDROCARBON RADICAL OF FROM 8 TO 18 CARBON ATOMS.
Claim 3
Dependent Claim
65 words
IN A PROCESS WHEREIN FIBERS COMPOSED OF AT LEAST 75% BY WEIGHT OF A MEMBER OF THE GROUP CONSISTING OF POLYACRYLONITRILE AND SYNTHETIC LINEAR POLYESTERS OF TEREPHTHALIC ACID WITH A POLYMETHYLENE GLYCOL ARE DYED BY PADDING WITH AN AQUEOUS BATH CONTAINING A SULFURIC ACID ESTER SALT OF A LEUCO VAT DYESTUFF, THE IMPROVEMENT COMPRISING EMPLOYING AS SUCH DYEBATH A DYEBATH AS DEFINED IN CLAIM 1.
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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) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |