US3357901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammonia, carbon dioxide recovery from urea synthesis utilizing an ejector
Assignee: Toyo Koatsu Industries Inc
•
Filing: 1965-10-11
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Granted: 1967-12-12
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Expires: 1985-10-11
Abstract
No abstract record available.
Inventors
- 👤 Otsuka Eiji
- 👤 Kanai Kazumichi
- 👤 Inoue Shigeru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:52
CPC Classifications
C; C07; C07C; C07C273/00; C07C273/02; C07C273/04
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) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |