US2982673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reducing the translucency of woven and knitted fabrics of polyamide fibres
Assignee: BASF Schweiz AG
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Filing: 1959-02-05
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Granted: 1961-05-02
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Expires: 1979-02-05
Abstract
No abstract record available.
Inventors
- 👤 Knup Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:12
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/51; D06M11/55; D06M11/57; D06M13/00; D06M13/50; D06M13/503; D06M15/00; D06M15/19; D06M15/21; D06M15/327; D06M15/333
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR REDUCING THE TRANSLUCENCY OF FABRICS OF POLYAMIDE FIBRES, WHICH COMPRISES IMPREGNATING THE FABRIC IN AN AQUEOUS ACID BATH WHICH CONTAINS POLYVINYL ACETATE EMULSIFIED WITH AN ANION-ACTIVE DISPERSING AGENT CONTAINING A SULPHURIC ACID ESTER GROUP AND ALSO CONTAINS AN ALUMINUM SALT CAPABLE OF REVERSING THE CHARGE OF ANION-ACTIVE PRODUCTS, DRYING THE IMPREGNATED FABRIC ACID THEN SUBJECTING IT TO A CALENDERING TREATMENT AT A RAISED TEMPERATURE.
Claim 2
Dependent Claim
67 words
A PROCESS FOR REDUCING THE TRANSLUCENCY OF FABRICS OF POLYAMIDE FIBRES, WHICH COMPRISES IMPREGNATING THE FABRIC IN AN AQUEOUS ACID BATH WHICH CONTAINS POLYVINYL ACETATE EMULSIFIED WITH AN ANION-ACTIVE DISPERSING AGENT CONTAINING A SULPHURIC ACID ESTER GROUP AND ALSO CONTAINS AN ALUMINUM SALT CAPABLE OF REVERSING THE CHARGE OF ANION-ACTIVE PRODUCTS, DRYING THE IMPREGNATED FABRIC ACID THEN SUBJECTING IT TO A CALENDERING TREATMENT AT A RAISED TEMPERATURE.
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) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |