Patent US3514512A successfully refreshed from Google Patents.
US3514512A
Expired / Lapsed
US
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Method for manufacturing improved acrylonitrile filaments
Assignee: Mitsubishi Chemical Corp
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Filing: 1968-02-07
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Granted: 1970-05-26
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Expires: 1988-02-07
Abstract
No abstract record available.
Inventors
- 👤 Shigeru Kikuchi
- 👤 Keishiro Ueno
- 👤 Shoji Imao
- 👤 Makoto Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:07
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38
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) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |