US2921777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor-liquid contact assemblies
Assignee: Sunoco Inc
•
Filing: 1956-06-01
•
Granted: 1960-01-19
•
Expires: 1976-06-01
Abstract
No abstract record available.
Inventors
- 👤 Peter S Hepp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:06
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/18; B01D3/20; Y; Y10; Y10S; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1200877A
Cited
US1899409A
Cited
US2055048A
Cited
US2378952A
Cited
US2443812A
Cited
US2510586A
Cited
FR977279A
Cited
US2525218A
Cited
FR1029074A
Cited
US2785882A
Cited
US2778621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |