Patent US4248527A successfully refreshed from Google Patents.
Patent US3527862A successfully refreshed from Google Patents.
US3527862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of polyester synthetic fibers
Assignee: Teijin Ltd
•
Filing: 1965-01-22
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Granted: 1970-09-08
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Expires: 1985-01-22
Abstract
No abstract record available.
Inventors
- 👤 Itsuya Shimosako
- 👤 Yoshiaki Hori
- 👤 Hitoshi Tonami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:14
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/225; D01; D01F; D01F6/00; D01F6/58; D01F6/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2734794A
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US2604689A
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GB903027A
Cited
US3176374A
Cited
US3233019A
Cited
US3305911A
Cited
US3247300A
Cited
US3275732A
Cited
US3184369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |