US3507935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile polymer compositions and fibers therefrom
Assignee: Toray Industries Inc
•
Filing: 1968-01-22
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Granted: 1970-04-21
•
Expires: 1988-01-22
Abstract
No abstract record available.
Inventors
- 👤 Zenzi Izumi
- 👤 Hideji Kitagawa
- 👤 Isao Ito
- 👤 Kazuo Yuki
- 👤 Hiroo Hiromoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:29
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; C08F220/10; C08F220/26; C08F220/28; C08F220/285; C08F220/286; C08L; C08L33/00; C08L33/18; C08L33/20; C08L33/04; C08L33/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3035031A
Cited
US3341627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |