US2926754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improved mechanical effectiveness and efficiency of component interchangeon a vapor liquid contacting tray
Assignee: EDW G RAGATZ Co
•
Filing: 1956-02-29
•
Granted: 1960-03-01
•
Expires: 1976-02-29
Abstract
No abstract record available.
Inventors
- 👤 Edward G Ragatz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:50
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/22; B01D3/32; B01D3/324; B01D3/326
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US208522A
Cited
US1811247A
Cited
US2116933A
Cited
GB569039A
Cited
US2678201A
Cited
US2693949A
Cited
US2693350A
Cited
US2713478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |