US3549734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming microfibers
Assignee: Individual
•
Filing: 1967-06-27
•
Granted: 1970-12-22
•
Expires: 1987-06-27
Abstract
No abstract record available.
Inventors
- 👤 Takeshi Yasuda
- 👤 Yasuharu Fujiwara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:47
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01D; D01D5/00; D01D5/28; D01D5/30; D01D5/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3382305A
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US3097991A
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US3099067A
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US3350488A
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US3234313A
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US3132194A
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US3323978A
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GB1076175A
Cited
US3359344A
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US3455773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |