US3776766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the processing properties of polyester filaments and fibres
Assignee: Hoechst AG
•
Filing: 1971-11-17
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Granted: 1973-12-04
•
Expires: 1991-11-17
Abstract
Abstract A process for improving the processing properties of polyester filaments by treating the freshly-spun filaments before being drawn with an aqueous solution or emulsion of a condensation product of 1 mole of a 1,4-butane-diolpolyglycol ether and 2 moles of a fatty acid.
Inventors
- 👤 A Scharf
- 👤 P Hess
- 👤 O Smerz
- 👤 W Linke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:01
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/53; D01; D01F; D01F6/00; D01F6/58; D01F6/62; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A process as claimed in claim 1, wherein the products of formula (I) are used in a concentration and under conditions under which it is possible to apply an amount of at least 0.05 percent on the filaments, calculated on the weight of the filaments.
Claim 2
Dependent Claim
29 words
A process as claimed in claim 1, wherein an aqueous solution or emulsion containing of from 2 to 18 g/l of a compound of the formula (I) is applied.
References Cited (Backward Citations)
US1970578A
Cited
US2820815A
Cited
US2920980A
Cited
US3113369A
Cited
US3406208A
Cited
US3433008A
Cited
US3563892A
Cited
US3423809A
Cited
US3694257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |