Patent US2434528A successfully refreshed from Google Patents.
US2434528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing ash-forming constituents and sediment from alkaline petroleum residuum
Assignee: Standard Oil Development Co
•
Filing: 1945-06-04
•
Granted: 1948-01-13
•
Expires: 1965-06-04
Abstract
No abstract record available.
Inventors
- 👤 Edward F Wadley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:05
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/04; C10G1/00; C10G19/00; C10G19/02; C10G31/00; C10G31/08
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) | 1951-01-12 | 1951-07-14 | 1952-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-12 | 1955-07-14 | 1956-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-12 | 1959-07-14 | 1960-01-13 | $7700.00 | Window Closed / Lapsed |