US2447577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treating hydrocarbon fluids
Assignee: Standard Oil Development Co
•
Filing: 1943-03-25
•
Granted: 1948-08-24
•
Expires: 1963-03-25
Abstract
No abstract record available.
Inventors
- 👤 Charles E Hemminger
- 👤 Charles W Tyson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:47
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2271645A
Cited
US2296722A
Cited
US2324165A
Cited
US2309137A
Cited
US2235133A
Cited
US2322019A
Cited
US2312445A
Cited
US2308557A
Cited
US2339874A
Cited
US2341193A
Cited
US2358888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |