US4408977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinneret orifice cross-sections
Assignee: Eastman Chemical Co
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Filing: 1982-06-21
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Granted: 1983-10-11
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Expires: 2002-06-21
Abstract
Abstract Spinneret orifices the planar cross-section of which defines intersecting quadrilaterals in connected series, the improvement being that one or more of the defined quadrilaterals is or are characterized by its or their width being greater than the width of the remaining quadrilateral(s), with the wider quadrilateral(s) defining body sections and with the remaining quadrilateral(s) defining wing member(s).
Inventors
- 👤 Bobby M. Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:43
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/253; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
74 words
A spinneret defining at least one spinneret orifice the planar cross-section of which defines intersecting quadrilaterals in connected series with the L/W of each quadrilateral varying from 2 to 10, the improvement being that one or more of the defined quadrilaterals is or are characterized by its or their width being greater than the width of the remaining quadrilateral(s), with the wider quadrilateral(s) defining body section(s) and with the remaining quadrilateral(s) defining wing members.
Claim 2
Dependent Claim
74 words
A spinneret defining at least one spinneret orifice the planar cross-section of which defines intersecting quadrilaterals in connected series with the L/W of each quadrilateral varying from 2 to 10, the improvement being that one or more of the defined quadrilaterals is or are characterized by its or their width being greater than the width of the remaining quadrilateral(s), with the wider quadrilateral(s) defining body section(s) and with the remaining quadrilateral(s) defining wing members.
Claim 3
Dependent Claim
40 words
A spinneret as defined in claim 1 wherein the number of intersecting quadrilaterals may vary from 2 to 14, said body section quadrilaterals may vary from 1 to 4 and said wing member quadrilaterals may vary from 1 to 5.
Claim 4
Dependent Claim
35 words
A spinneret as defined in claim 2 wherein the number of said intersecting quadrilaterals is 8, the number of said body section quadrilaterals is 2 and the number of said wing member quadrilaterals is 3.
Claim 5
Dependent Claim
43 words
A spinneret as defined in claim 1 wherein the angle θ B between adjacent body section quadrilaterals may vary from about 30° to about 90°, and the angle θ W between adjacent wing member quadrilaterals may vary from about 45° to about 150°.
Claim 6
Dependent Claim
33 words
A spinneret as defined in claim 4 wherein said angle θ B may vary from about 45° to about 60° and said angle θ W may vary from about 45° to about 90°.
Claim 7
Dependent Claim
48 words
A spinneret as defined in claim 1 wherein the L B /W B of the body section quadrilaterals may vary in proportional relationship from about 1.5 to about 10, and the L W /W W of the wing member quadrilaterals may vary from about 3 to about 10.
Claim 8
Dependent Claim
38 words
A spinneret as defined in claim 6 wherein said L B /W B may vary in proportional relationship from about 2 to about 5, and said L W /W W may vary from about 4 to about 6.
Claim 9
Dependent Claim
27 words
A spinneret as defined in claim 1 wherein each end of said connected series of quadrilaterals in said spinneret orifice defines a circular bore of predetermined diameter.
Claim 10
Dependent Claim
36 words
A spinneret as defined in claim 8 wherein the diameter D of said circular bore divided by the width of the wing member W W may vary in proportional relationship from about 1.5 to about 2.5.
Claim 11
Dependent Claim
15 words
A spinneret as defined in claim 9 wherein the ratio D/W W may be 2.
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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) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |