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US3555600A
Expired / Lapsed
US
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Spinneret for producing hollow filaments
Assignee: Individual
•
Filing: 1967-12-01
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Granted: 1971-01-19
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Expires: 1987-12-01
Abstract
Abstract A SPINNERET FOR SPINNING HOLLOW FILAMENTS HAVING A MAXIMUM AMOUNT OF OPEN SPACE IN RELATION TO THE OUTER DIMENSIONS OF SAID FILAMENTS. THE FILAMENTS ARE EXTRUDED FROM A GROUP OF THREE SLOTS HAVING A DOG-LEG PORTION AT ONE END FACING INTO THE OPPOSITE END OF AN ADJACENT SLOT. THE POLYMER OCCLUDING AREA DEFINED BY THE ARRANGEMENT OF THE SLOTS FORMS SUBSTANTIALLY AN EQUILATERAL TRIANGLE. FILAMENTS MELT SPUN FROM THIS SPINNERET HAVE A SHARPLY DEFINED INNER AND OUTER TRIANGULAR CROSS SECTION.
Inventors
- 👤 Maurice S Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:20
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/09; B29C48/12; B29C48/25; B29C48/30; B29C48/345; D01D5/253; B29C48/10; Y; Y10; Y10S; Y10S425/00; Y10S425/217
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |