US3374052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for solid particles-fluid contact operations
Assignee: Department OF CHEMICAL ENGINEERING
•
Filing: 1965-12-20
•
Granted: 1968-03-19
•
Expires: 1985-12-20
Abstract
No abstract record available.
Inventors
- 👤 Fan Liang-Tseng
- 👤 Wen Chin Yung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:04
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/30; C07C209/32; C07C209/36; B; B01; B01J; B01J8/00; B01J8/18; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/77; C01B3/00; C01B3/02; C01B3/22; C01B3/24; C01B3/28; C01B3/32; C01B3/34; C01B3/38; C01B3/42; C07C17/00; C07C17/093; C07C17/10; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/36; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |