US3751547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing high modulus polyvinyl alcohol synthetic fibers
Assignee: Unitika Ltd
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Filing: 1971-06-28
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Granted: 1973-08-07
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Expires: 1991-06-28
Abstract
Abstract A PROCESS FOR PRODUCING HIGH MODULUS POLYVINYL ALCOHOL SYNTHETIC FIBERS WHICH COMPRISES SPIN-DRAWING POLYVINYL ALCOHOL SYNTHETIC FIBERS HAVING A HOMOGENEOUS SECTION AND THE CARRYING OUT A MULTISTAGE HOT DRAWING. POLYVINYL ALCOHOL SYNTHETIC FIBERS ARE PRODUCED BY SUCH A PROCESS.
Inventors
- 👤 H Kawakami
- 👤 K Kawabata
- 👤 K Kimura
- 👤 H Satoh
- 👤 A Miyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:22
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/228; D01; D01F; D01F6/00; D01F6/02; D01F6/14
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |