Patent US2681845A successfully refreshed from Google Patents.
US2681845A
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Acid vat dyeing of animal fibers
Assignee: General Dyestuff Corp
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Filing: 1951-01-15
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Granted: 1954-06-22
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Expires: 1971-01-15
Abstract
No abstract record available.
Inventors
- 👤 Luttringhaus Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:35
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/22; D06P1/225; Y; Y10; Y10S; Y10S8/00; Y10S8/90; Y10S8/908; Y10S8/912; Y10S8/913; Y10S8/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A PROCESS FOR DYEING ANIMAL TEXTILE FIBRE WITH A VAT DYE OF THE CLASS CONSISTING OF DYESTUFFS OF THE INDIGOID AND BIS-ARYLIDOBENZOQUINONE SERIES, WHICH COMPRISES PADDING THE MATERIAL WITH AN ACIDIC AQUEOUS DISPERION HAVINGA A PH OF 3 TO 6 OF A LEUCO COMPOUND OF SAID VAT DYESTUFF CONTAINING A DISPERSING AGENT THEREFOR, IMMERSING THE PADDED MATERIAL IN AN AQUEOUS ACID SOLUTION HAVING A PH OF 1 TO 3 AT A TEMPERATURE OF ABOUT 200* TO 212* F., THE DURATION OF THE IMMERSION OF THE MATERIAL IN THE LATTER BATH BEING AT LEAST ONE-HALF MINUTE, AND OXIDIZING TH LEUCO COMPOUND ON THE FIBRE.
Claim 2
Dependent Claim
103 words
A PROCESS FOR DYEING ANIMAL TEXTILE FIBRE WITH A VAT DYE OF THE CLASS CONSISTING OF DYESTUFFS OF THE INDIGOID AND BIS-ARYLIDOBENZOQUINONE SERIES, WHICH COMPRISES PADDING THE MATERIAL WITH AN ACIDIC AQUEOUS DISPERION HAVINGA A PH OF 3 TO 6 OF A LEUCO COMPOUND OF SAID VAT DYESTUFF CONTAINING A DISPERSING AGENT THEREFOR, IMMERSING THE PADDED MATERIAL IN AN AQUEOUS ACID SOLUTION HAVING A PH OF 1 TO 3 AT A TEMPERATURE OF ABOUT 200* TO 212* F., THE DURATION OF THE IMMERSION OF THE MATERIAL IN THE LATTER BATH BEING AT LEAST ONE-HALF MINUTE, AND OXIDIZING TH LEUCO COMPOUND ON THE FIBRE.
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) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |