Patent US3135813A successfully refreshed from Google Patents.
US3135813A
Expired / Lapsed
US
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Novel yarn like structures from extruded thin walled tubing
Assignee: Imperial Chemical Industries Ltd
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Filing: 1962-05-25
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Granted: 1964-06-02
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Expires: 1982-05-25
Abstract
No abstract record available.
Inventors
- 👤 Speakman Raymond Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:25
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; Y; Y10; Y10S; Y10S264/00; Y10S264/16; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A PROCESS FOR THE MANUFACTURE OF YARN-LIKE STRUCTURES FROM FIBER-FORMING SYNTHETIC LINEAR POLYMERS SELECTED FROM THE GROUP CONSISTING OF NYLON, POLYESTER AND COPOLYESTERS BASED ON TEREPHTHALIC ACID, AND STEREOSPECIFIC POLYPROPYLENE COMPRISING: EXTRUDING THE POLYMER IN THE FORM OF A THIN-WALLED TUBE THROUGH A SUBSTANTIALLY ANNULAR APERTURE; INTRODUCING A GAS SUPPLY INTO THE TUBE; AND WINDING THE TUBE AT A SPEED WHICH IS SO RELATED TO THE DIMENSIONS OF THE ANNULUS, THE RATE OF INTRODUCTION OF THE GAS AND THE FINAL DESIRED DENIER OF 25 TO 150, THAT THE FINAL WALL THICKNESS DOES NOT EXCEED 8 MICRONS, THE INTRODUCTION OF THE GAS BEING AT SUCH A RATE THAT THE GAS CONTAINED WITHIN ANY FINITE PORTION OF THE TUBE IS OF SUBSTANTIALLY THE SAME VOLUME AS THAT CONTAINED WITHIN ANY OTHER PORTION OF THE TUBE OF THE SAME TOTAL WEIGHT AS SAID FIRST PORTION, DUE ALLOWANCE BEING MADE FOR VARIATION OF TEMPERATURES AND EXPANSION OF THE GAS DURING THE PROCESS THE DIAMETER OF THE ANNULUS (S) BEING RELATED TO THE PROCESS VARIABLES BY THE EXPRESSION
Claim 2
Dependent Claim
173 words
A PROCESS FOR THE MANUFACTURE OF YARN-LIKE STRUCTURES FROM FIBER-FORMING SYNTHETIC LINEAR POLYMERS SELECTED FROM THE GROUP CONSISTING OF NYLON, POLYESTER AND COPOLYESTERS BASED ON TEREPHTHALIC ACID, AND STEREOSPECIFIC POLYPROPYLENE COMPRISING: EXTRUDING THE POLYMER IN THE FORM OF A THIN-WALLED TUBE THROUGH A SUBSTANTIALLY ANNULAR APERTURE; INTRODUCING A GAS SUPPLY INTO THE TUBE; AND WINDING THE TUBE AT A SPEED WHICH IS SO RELATED TO THE DIMENSIONS OF THE ANNULUS, THE RATE OF INTRODUCTION OF THE GAS AND THE FINAL DESIRED DENIER OF 25 TO 150, THAT THE FINAL WALL THICKNESS DOES NOT EXCEED 8 MICRONS, THE INTRODUCTION OF THE GAS BEING AT SUCH A RATE THAT THE GAS CONTAINED WITHIN ANY FINITE PORTION OF THE TUBE IS OF SUBSTANTIALLY THE SAME VOLUME AS THAT CONTAINED WITHIN ANY OTHER PORTION OF THE TUBE OF THE SAME TOTAL WEIGHT AS SAID FIRST PORTION, DUE ALLOWANCE BEING MADE FOR VARIATION OF TEMPERATURES AND EXPANSION OF THE GAS DURING THE PROCESS THE DIAMETER OF THE ANNULUS (S) BEING RELATED TO THE PROCESS VARIABLES BY THE EXPRESSION
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |