US3349554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
False twist spindle
Assignee: Rhodiaceta SA
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Filing: 1965-08-02
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Granted: 1967-10-31
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Expires: 1985-08-02
Abstract
No abstract record available.
Inventors
- 👤 Boutonnet Alexandre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:20
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/04; D02G1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A FALSE TWIST SPINDLE FOR IMPARTING A FALSE TWIST TO A FILAMENT, SUCH SPINDLE COMPRISING A HOLLOW TUBE DEFINING A CENTRAL PASSAGE THERETHROUGH FOR THE FILAMENT; AT LEAST ONE TRANSVERSE BAR EXTENDING ACROSS SAID PASSAGE; A PERIPHERAL SURFACE TO SAID BAR ABOUT WHICH A FILAMENT PASSES EFFECTIVE TO REVERSE ITS TWIST; THE CROSS-SECTIONAL SHAPE OF SAID BAR AT LEAST AT THE CENTER THEREOF BEING NON-CIRCULAR AND SUCH THAT THE PERIPHERAL SURFACE HAS AT LEAST ONE REGION HAVING A PRONOUNCED CURVATURE.
Claim 2
Dependent Claim
80 words
A FALSE TWIST SPINDLE FOR IMPARTING A FALSE TWIST TO A FILAMENT, SUCH SPINDLE COMPRISING A HOLLOW TUBE DEFINING A CENTRAL PASSAGE THERETHROUGH FOR THE FILAMENT; AT LEAST ONE TRANSVERSE BAR EXTENDING ACROSS SAID PASSAGE; A PERIPHERAL SURFACE TO SAID BAR ABOUT WHICH A FILAMENT PASSES EFFECTIVE TO REVERSE ITS TWIST; THE CROSS-SECTIONAL SHAPE OF SAID BAR AT LEAST AT THE CENTER THEREOF BEING NON-CIRCULAR AND SUCH THAT THE PERIPHERAL SURFACE HAS AT LEAST ONE REGION HAVING A PRONOUNCED CURVATURE.
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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |