US2693350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Construction for handling vapors and liquids as in bubble columns or the like
Assignee: EDW G RAGATZ Co
•
Filing: 1951-07-14
•
Granted: 1954-11-02
•
Expires: 1971-07-14
Abstract
No abstract record available.
Inventors
- 👤 Edward G Ragatz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:48
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US755705A
Cited
US1700698A
Cited
US1738870A
Cited
US1822323A
Cited
US1811247A
Cited
US2116933A
Cited
FR878151A
Cited
GB569039A
Cited
US2568749A
Cited
US2378952A
Cited
US2582826A
Cited
US2420075A
Cited
US2501114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |