US2552404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dyeing animal and other fibers having similar properties
Assignee: BASF Schweiz AG
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Filing: 1947-06-16
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Granted: 1951-05-08
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Expires: 1967-06-16
Abstract
No abstract record available.
Inventors
- 👤 Casty Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:21
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/90; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PROCESS FOR DEYING WOOL WHICH COMPRISES BRINGING WOOL IMPREGNATED WITH A SOLUTION OF A DYESTUFF OF THE KINE POSSESSING AFFINITY FOR WOOL DUE TO THE PRESENCE OF ACID GROUPS IN THE DYESTUFF INTO SUDDEN CONTACT WITH AN AQUEOUS ACIDIC SOLUTION, HEATED TO ABOUT ITS BOILING POINT, THE ACIDITY OF WHICH CORRESPONDS TO THAT OF A SOLUTION CONTAINING NOT MORE THAN 30 GRAMS OF H2SO4 IN ONE LITER OF WATER, THE SAID ACIDIC SOLUTION BEING FREE FROM OXIDIZING AGENTS AND FREE FROM REDUCING AGENTS HARMFUL TO THE DYESTUFF, THE WHOLE DYEING O-ERATION BEING CARRIED OUT UNDER ATMOSPHERIC PRESSURE.
Claim 2
Dependent Claim
98 words
A PROCESS FOR DEYING WOOL WHICH COMPRISES BRINGING WOOL IMPREGNATED WITH A SOLUTION OF A DYESTUFF OF THE KINE POSSESSING AFFINITY FOR WOOL DUE TO THE PRESENCE OF ACID GROUPS IN THE DYESTUFF INTO SUDDEN CONTACT WITH AN AQUEOUS ACIDIC SOLUTION, HEATED TO ABOUT ITS BOILING POINT, THE ACIDITY OF WHICH CORRESPONDS TO THAT OF A SOLUTION CONTAINING NOT MORE THAN 30 GRAMS OF H2SO4 IN ONE LITER OF WATER, THE SAID ACIDIC SOLUTION BEING FREE FROM OXIDIZING AGENTS AND FREE FROM REDUCING AGENTS HARMFUL TO THE DYESTUFF, THE WHOLE DYEING O-ERATION BEING CARRIED OUT UNDER ATMOSPHERIC PRESSURE.
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) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |