US3524730A
Expired / Lapsed
US
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Apparatus for carrying out a polycondensation reaction continuously
Assignee: Toray Industries Inc
•
Filing: 1967-11-21
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Granted: 1970-08-18
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Expires: 1987-11-21
Abstract
No abstract record available.
Inventors
- 👤 Rei Yokouchi Yoshio Takehisa
- 👤 Ko Yuge
- 👤 Naoyuki Mitani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:24
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/20; B01F; B01F27/00; B01F27/60; B01F27/72; B01F27/721; B01F27/723; B01F27/726; 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |