US3516239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial fiber having voids and method of manufacture thereof
Assignee: Teijin Ltd
•
Filing: 1967-03-13
•
Granted: 1970-06-23
•
Expires: 1987-03-13
Abstract
No abstract record available.
Inventors
- 👤 Kenji Fukuda
- 👤 Yujiro Okamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:28
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/12; D01D; D01D5/00; D01D5/24; D01D5/247; D01D5/28; D01D5/30; D01D5/34; D01F8/14; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2973; Y10T428/2978; Y10T428/31504; Y10T428/31507; Y10T428/31725; Y10T428/3175; Y10T428/31786; Y10T428/31797; Y10T442/00; Y10T442/30; Y10T442/3065; Y10T442/3089; Y10T442/3098; Y10T442/60; Y10T442/608; Y10T442/609; Y10T442/61
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2948048A
Cited
US3085987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |