Patent US4457974A successfully refreshed from Google Patents.
US4457974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bicomponent filament and process for making same
Assignee: EIDP Inc
•
Filing: 1980-07-14
•
Granted: 1984-07-03
•
Expires: 2000-07-14
Abstract
Abstract A bicomponent filament of nylon and polyester having a reduced tendency to pre-split, said filament being substantially free from antimony or any other material that will form a deposit on the walls of the spinneret aperture, and the process of preparing said filament. The filament has a substantially uniform cross sectional dimension throughout its length.
Inventors
- 👤 James T. Summers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:19
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/14; D01F8/12; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2931
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
46 words
A process for the production of nylon/polyester bicomponent filaments which comprises simultaneously spinning through the same spinneret capillary, nylon and polyester, said polyester being substantially free of a compound which will react with the nylon to form a deposit on the walls of the spinneret capillary.
Claim 2
Dependent Claim
46 words
A process for the production of nylon/polyester bicomponent filaments which comprises simultaneously spinning through the same spinneret capillary, nylon and polyester, said polyester being substantially free of a compound which will react with the nylon to form a deposit on the walls of the spinneret capillary.
Claim 3
Dependent Claim
13 words
A bicomponent filament of nylon and polyester which is substantially free of antimony.
Claim 4
Dependent Claim
13 words
A bicomponent filament of nylon and polyester which is substantially free of antimony.
Claim 5
Dependent Claim
17 words
A bicomponent filament of nylon and polyester having substantially the same cross sectional dimensions throughout its length.
Claim 6
Dependent Claim
17 words
A bicomponent filament of nylon and polyester having substantially the same cross sectional dimensions throughout its length.
References Cited (Backward Citations)
US3068204A
Cited
US3117906A
Cited
US3418200A
Cited
US3489641A
Cited
US3681910A
Cited
US4118534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |