US3595854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetate filaments of improved resistance to hydrothermal delustering and the process for preparation thereof
Assignee: Teijin Ltd
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Filing: 1968-11-26
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Granted: 1971-07-27
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Expires: 1988-11-26
Abstract
Abstract CELLULOSE ACETATE FILAMENTS HAVING EXCELLENT RESISTANCE TO HYDROTHERMAL DELUSTERING IN HOT WATER OF 110*C. AND ABOVE, GOOD QUALITATIVE REPRODUCIBILITY AND PRACTICALLY SATISFACTORY FIBER STRENGTH, AND PROCESS FOR PRODUCING SUCH FILAMENTS BY USING CELLULOSE ACETATE FLAKES WHICH HAVE BEEN POST-TREATED UNTIL THEIR REFINED PARAMETER AT THE STABILITY OF 0.08% IS REDUCED TO NO HIGHER THAN 80.
Inventors
- 👤 Masao Matsuzaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:08
CPC Classifications
C; C08; C08B; C08B3/00; C08B3/22; D; D01; D01F; D01F2/00; D01F2/24; D01F2/28; D01F2/30
Claims Analysis
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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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |