Patent US2424147A successfully refreshed from Google Patents.
US2424147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlling catalyst-oil ratio by use of a venturi
Assignee: Standard Oil Development Co
•
Filing: 1941-05-09
•
Granted: 1947-07-15
•
Expires: 1961-05-09
Abstract
No abstract record available.
Inventors
- 👤 Donald L Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:44
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/08; B01J8/082; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2559; Y10T137/2564
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1250319A
Cited
US1541848A
Cited
US1677691A
Cited
US1944243A
Cited
US2217634A
Cited
US2231231A
Cited
US2248196A
Cited
US2296386A
Cited
US2326705A
Cited
US2302209A
Cited
US2271148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-14 | 1951-01-13 | 1951-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-14 | 1955-01-13 | 1955-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-14 | 1959-01-13 | 1959-07-15 | $7700.00 | Window Closed / Lapsed |