Patent US3342920A successfully refreshed from Google Patents.
US3342920A
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US
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Method of manufacturing synthetic fibers containing crystalline isotactic polystyrene having excellent physical properties
Assignee: Kurashiki Rayon Co Ltd
•
Filing: 1963-06-27
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Granted: 1967-09-19
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Expires: 1983-06-27
Abstract
No abstract record available.
Inventors
- 👤 Fukushima Osamu
- 👤 Imai Kiyokazu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:41
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/44; D01F6/56; C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0016; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L27/00; C08L27/02; C08L27/04; D01F6/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3112301A
Cited
US3037948A
Cited
US3112300A
Cited
US3014887A
Cited
US3069406A
Cited
US3055730A
Cited
US3019077A
Cited
US3110548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |