Patent US2890092A successfully refreshed from Google Patents.
US2890092A
Expired / Lapsed
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Dyeing synthetic fibers with vat dyestuffs
Assignee: GAF Chemicals Corp
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Filing: 1955-11-25
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Granted: 1959-06-09
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Expires: 1975-11-25
Abstract
No abstract record available.
Inventors
- 👤 Henry R Mautner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:21
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/70; D06P3/701; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN A PROCESS WHEREIN FIBRES 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 PLYMETHYLENE GLYCOL ARE DYED BY PADDING WITH AN AQUEOUS DYEBATH CONTAINING A MEMBER OF THE GROUP CONSISTING OF SULFURIC ACID ESTER SALTS OF LEUCO VAT DYESTUFFS AND VAT DYESTUFFS IN FREE ANTHROL FORM, THE IMPROVEMENT COMPRISING INCLUDING IN SAID DYEBATH ABOUT 5 TO 20% BY WEIGHT OF AN N-LOWER ALKYL-2-PYRROLIDONE.
Claim 2
Dependent Claim
80 words
IN A PROCESS WHEREIN FIBRES 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 PLYMETHYLENE GLYCOL ARE DYED BY PADDING WITH AN AQUEOUS DYEBATH CONTAINING A MEMBER OF THE GROUP CONSISTING OF SULFURIC ACID ESTER SALTS OF LEUCO VAT DYESTUFFS AND VAT DYESTUFFS IN FREE ANTHROL FORM, THE IMPROVEMENT COMPRISING INCLUDING IN SAID DYEBATH ABOUT 5 TO 20% BY WEIGHT OF AN N-LOWER ALKYL-2-PYRROLIDONE.
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) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |