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Patent US3383447A successfully refreshed from Google Patents.
US3383447A
Expired / Lapsed
US
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Method of manufacturing synthetic fibers of polyvinyl alcohol having good stable configuration and water solubility
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1964-04-10
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Granted: 1968-05-14
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Expires: 1984-04-10
Abstract
No abstract record available.
Inventors
- 👤 Onishi Shigekazu
- 👤 Morita Eiichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:41
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/14
Claims Analysis
Total Claims: 0
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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) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |