Patent US3400531A successfully refreshed from Google Patents.
US3400531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulky yarns
Assignee: Asahi Kasei Corp
•
Filing: 1967-01-06
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Granted: 1968-09-10
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Expires: 1987-01-06
Abstract
No abstract record available.
Inventors
- 👤 Ohfuka Toshio
- 👤 Yokoyama Hiroshi
- 👤 Sato Hideo
- 👤 Inai Yoshikazu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:32
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/18; Y; Y10; Y10S; Y10S264/00; Y10S264/26; Y10S57/00; Y10S57/905
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3081516A
Cited
US3146574A
Cited
US3157021A
Cited
US3330896A
Cited
US3161011A
Cited
US3200576A
Cited
US3279163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |