US2431455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contacting liquids with gaseous fluids in the presence of solid particles
Assignee: Standard Oil Development Co
•
Filing: 1943-12-24
•
Granted: 1947-11-25
•
Expires: 1963-12-24
Abstract
No abstract record available.
Inventors
- 👤 Forrest H Blanding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:06
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/20; B01J8/22; Y; Y10; Y10S; Y10S159/00; Y10S159/03; Y10S261/00; Y10S261/72; Y10S423/00; Y10S423/09; Y10S423/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1141266A
Cited
GB121752A
Cited
US1816525A
Cited
US2160549A
Cited
US2253261A
Cited
US2273075A
Cited
US2361978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |