US3249668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for manufacturing branched filaments
Assignee: Ernest Scragg and Sons Ltd
•
Filing: 1962-10-22
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Granted: 1966-05-03
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Expires: 1982-10-22
Abstract
No abstract record available.
Inventors
- 👤 Scragg Frederick
- 👤 Alexander A Chubb
- 👤 Nesbitt-Dufort Timothy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:42
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/42; D01D5/426; B; B29; B29C; B29C48/00; B29C48/001; B29C48/0022; B29C48/03; B29C48/05; B29C48/09; B29C48/25; B29C48/30; B29C48/32; B29C48/33; B29C2793/00; B29C2793/0063; B29C48/0019; B29C48/10; B29L; B29L2023/00; B29L2023/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A PROCESS FOR CONTINUOUSLY MANUFACTURING BRANCHED FILAMENTS, THE STEPS OF CONTINUOUSLY EXTRUDING A PLASTIC TUBE WHILE SIMULTANEOUSLY PROVIDING IT WITH AT LEAST ONE SPIRAL FIN; AND THEREAFTER CUTTING A PLURALITY OF CLOSELY SPACED PARALLEL SLITS IN SAID PLASTIC TUBE EXTENDING IN THE LONGITUDINAL DIRECTION THEREOF AND INTERSECTING SAID SPIRAL FIN SO AS TO FORM SIMULTANEOUSLY A CORRESPONDING PLURALITY OF FILAMENTS EACH HAVING SPACED BRANCHES FORMED BY SLIT SECTIONS OF SAID SPIRAL FIN.
Claim 2
Dependent Claim
73 words
IN A PROCESS FOR CONTINUOUSLY MANUFACTURING BRANCHED FILAMENTS, THE STEPS OF CONTINUOUSLY EXTRUDING A PLASTIC TUBE WHILE SIMULTANEOUSLY PROVIDING IT WITH AT LEAST ONE SPIRAL FIN; AND THEREAFTER CUTTING A PLURALITY OF CLOSELY SPACED PARALLEL SLITS IN SAID PLASTIC TUBE EXTENDING IN THE LONGITUDINAL DIRECTION THEREOF AND INTERSECTING SAID SPIRAL FIN SO AS TO FORM SIMULTANEOUSLY A CORRESPONDING PLURALITY OF FILAMENTS EACH HAVING SPACED BRANCHES FORMED BY SLIT SECTIONS OF SAID SPIRAL FIN.
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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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |