US3498754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous polycondensation apparatus
Assignee: Teijin Ltd
•
Filing: 1965-12-17
•
Granted: 1970-03-03
•
Expires: 1985-12-17
Abstract
No abstract record available.
Inventors
- 👤 Toyotsugu Yamashita
- 👤 Seiji Uno
- 👤 Shozo Suzuki
- 👤 Itaru Nakamura
- 👤 Nobuo Sakaiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:25
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/60; B01F27/70; B01F27/701; B01F27/706; B01J; B01J19/00; B01J19/18; B01J19/20; C; C08; C08G; C08G63/00; C08G63/78; C08G63/785; B01J2219/00; B01J2219/18; B01J2219/182
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2630302A
Cited
US2964391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |