US3539680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for drawing polyester filaments
Assignee: Teijin Ltd
•
Filing: 1967-08-07
•
Granted: 1970-11-10
•
Expires: 1987-08-07
Abstract
No abstract record available.
Inventors
- 👤 Takaaki Fukushima
- 👤 Haruki Takizawa
- 👤 Kikuo Hori
- 👤 Yoshito Sato
- 👤 Haruhiko Mizumori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:18
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/228; D01; D01D; D01D5/00; D01D5/12; D01D5/16; D01F; D01F6/00; D01F6/58; D01F6/62; D02J1/224; D02J1/225; D02J1/227
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3358344A
Cited
US3092891A
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US3302385A
Cited
US3379809A
Cited
US3376622A
Cited
US3381461A
Cited
US3256134A
Cited
US3404525A
Cited
US3374302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |