Patent US2769684A successfully refreshed from Google Patents.
US2769684A
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Process for stripping and lightening wool dyeings
Assignee: BASF Schweiz AG
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Filing: 1953-02-24
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Granted: 1956-11-06
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Expires: 1973-02-24
Abstract
No abstract record available.
Inventors
- 👤 Geigy Wilhelm
- 👤 Albrecht Otto
- 👤 Meyer Jules
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:24
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/13; D06P5/138
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR LIGHTING AND STRIPPING DYEINGS OF WOOL DYESTUFFS ON BASIC NITROGENOUS FIBERS, WHICH CONSISTS IN CONTACTING THE DYE MATERIAL WITH A CONDENSATION PRODUCT SELECTED FROM THE GROUP CONSISTING OF CONDENSATION PRODUCTS OF AT LEAST 4 MOLS OF AN A, B-ALKYLENE OXIDE AND ONE MOL OF A PRIMARY AMINE WHICH CONTAINS A HYDROCARBON RADICAL WITH AT LEAST 10 CARBON ATOMS AND WATERSOLUBLE SALTS OF SUCH CONDENSATION PRODUCTS.
Claim 2
Dependent Claim
68 words
A PROCESS FOR LIGHTING AND STRIPPING DYEINGS OF WOOL DYESTUFFS ON BASIC NITROGENOUS FIBERS, WHICH CONSISTS IN CONTACTING THE DYE MATERIAL WITH A CONDENSATION PRODUCT SELECTED FROM THE GROUP CONSISTING OF CONDENSATION PRODUCTS OF AT LEAST 4 MOLS OF AN A, B-ALKYLENE OXIDE AND ONE MOL OF A PRIMARY AMINE WHICH CONTAINS A HYDROCARBON RADICAL WITH AT LEAST 10 CARBON ATOMS AND WATERSOLUBLE SALTS OF SUCH CONDENSATION PRODUCTS.
References Cited (Backward Citations)
US1923178A
Cited
US1970578A
Cited
US2003928A
Cited
US2042194A
Cited
US2185163A
Cited
US2155135A
Cited
US2525770A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |