Patent US3701749A successfully refreshed from Google Patents.
US3701749A
Expired / Lapsed
US
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Polyvinylidene fluoride-flavanthron composition
Assignee: Kureha Corp
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Filing: 1971-04-02
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Granted: 1972-10-31
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Expires: 1991-04-02
Abstract
Abstract POLYVINYL FLUORIDE COMPOSITION OF IMPROVED CRYSTALLINITY AND IMPACT STRENGTH CONTAINING FLAVANTHRON AS A CRYSTAL NUCLEATING AGENT.
Inventors
- 👤 Masahiro Segawa
- 👤 Yukichika Kawakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:15
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3437; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154
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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |