US3135577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the handle of polyethylene terephthalate fabrics with an alkali metal hydroxide and specific quaternary ammonium salts
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1960-12-19
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Granted: 1964-06-02
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Expires: 1980-12-19
Abstract
No abstract record available.
Inventors
- 👤 Watson William Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:12
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/38; D06M13/00; D06M13/322; D06M13/46; D06M13/463; Y; Y10; Y10S; Y10S8/00; Y10S8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR IMPROVING THE HANDLE OF FABRICS OF POLYETHYLENE TEREPHTHALATE FILAMENTS AND FIBERS IN THEIR DRAWN CONDITION WHICH COMPRISES CONTACTING SAID FABRICS WITH AN AQUEOUS SOLUTION CONTAINING 0.5%5% OF A CAUSTIC ALKALI METAL HYDROXIDE AND 0.005-0.5% OF A MEMBER OF THE GROUP CONSISTING OF LAURYL DIMETHYL BENZYL AMMONIUM CHLORIDE AND CETYL TRIMETHYL AMMONIUM BROMIDE UNTIL A PORTION OF THE SURFACE OF THE FILAMENTS HAS BEEN DISSOLVED.
Claim 2
Dependent Claim
67 words
A PROCESS FOR IMPROVING THE HANDLE OF FABRICS OF POLYETHYLENE TEREPHTHALATE FILAMENTS AND FIBERS IN THEIR DRAWN CONDITION WHICH COMPRISES CONTACTING SAID FABRICS WITH AN AQUEOUS SOLUTION CONTAINING 0.5%5% OF A CAUSTIC ALKALI METAL HYDROXIDE AND 0.005-0.5% OF A MEMBER OF THE GROUP CONSISTING OF LAURYL DIMETHYL BENZYL AMMONIUM CHLORIDE AND CETYL TRIMETHYL AMMONIUM BROMIDE UNTIL A PORTION OF THE SURFACE OF THE FILAMENTS HAS BEEN DISSOLVED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |