US4318680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinnerette plate having multiple capillaries per counterbore for melt spinning fusion melts of acrylonitrile polymer and water
Assignee: Wyeth Holdings LLC
•
Filing: 1980-06-09
•
Granted: 1982-03-09
•
Expires: 2000-06-09
Abstract
Abstract A spinnerette plate having multiple capillaries per counterbore can be effectively used to melt-spin fusion melts of acrylonitrile polymer and water without sticking together of individual filaments.
Inventors
- 👤 Ronald E. Pfeiffer
- 👤 Stanley E. Peacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:01
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D01D; D01D4/00; D01D4/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
51 words
A spinnerette plate having a plurality of counterbores and within each counterbore, at least about 3 capillaries, said capillaries being at a density of at least about 18 per square centimeter of plate surface and said counterbores being spaced center to center at a distance of less than about 5 millimeters.
Claim 2
Dependent Claim
51 words
A spinnerette plate having a plurality of counterbores and within each counterbore, at least about 3 capillaries, said capillaries being at a density of at least about 18 per square centimeter of plate surface and said counterbores being spaced center to center at a distance of less than about 5 millimeters.
Claim 3
Dependent Claim
15 words
The spinnerette plate of claim 1 having a capillary density of 62 per square centimeter.
Claim 4
Dependent Claim
11 words
The spinnerette plate of claim 1 having 7 capillaries per counterbore.
Claim 5
Dependent Claim
15 words
The spinnerette plate of claim 1 having a capillary density of 377 per square centimeter.
Claim 6
Dependent Claim
11 words
The spinnerette plate of claim 1 having 19 capillaries per counterbore.
References Cited (Backward Citations)
US197564A
Cited
US2465408A
Cited
US3454986A
Cited
US3621088A
Cited
US3667886A
Cited
US3824050A
Cited
US3857665A
Cited
JPS517218A
Cited
US4248577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-08 | 1985-09-07 | 1986-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-08 | 1989-09-07 | 1990-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-08 | 1993-09-07 | 1994-03-09 | $7700.00 | Window Closed / Lapsed |