Patent US3582418A successfully refreshed from Google Patents.
US3582418A
Expired / Lapsed
US
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Production of crimped thermoplastic fibers
Assignee: Shell USA Inc
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Filing: 1967-08-28
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Granted: 1971-06-01
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Expires: 1987-08-28
Abstract
Abstract CRIMPED NARROW STRIPS, FIBERS OR FILAMENTS OF THERMOPLASTIC COMPOSITIONS ARE PRODUCED BY STRETCHING AND SLITTING OR FIBRILLATING MULTILAYERED FILMS OF THERMOPLASTICS CONSISTING OF COEXTRUDED LAYERS WHICH HAVE SIGNIFICANTLY DIFFERENT STRESS-STRAIN CURVES AT IDENTICAL TEMPERATURES.
Inventors
- 👤 Gerrit Schuur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:18
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/42; D01D5/423; B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/09; B29C48/10; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B32; B32B; B32B27/00; D01D5/22; D01D5/426; B29C48/05; Y; Y10; Y10S; Y10S264/00; Y10S264/47; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1084; Y10T156/1087; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2929
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |