US2805189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heating and fluidizing for a carbonization process
Assignee: Standard Oil Co
•
Filing: 1950-05-25
•
Granted: 1957-09-03
•
Expires: 1970-05-25
Abstract
No abstract record available.
Inventors
- 👤 Olin E Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:02
CPC Classifications
C; C10; C10B; C10B49/00; C10B49/02; C10B49/04; C10B49/08; C10B49/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1276879A
Cited
US1676675A
Cited
US1651994A
Cited
GB241659A
Cited
US1805109A
Cited
GB253878A
Cited
US1756896A
Cited
US1838883A
Cited
GB286404A
Cited
US1963167A
Cited
US1983943A
Cited
US1993198A
Cited
US2167099A
Cited
US2167100A
Cited
US2573906A
Cited
US2472377A
Cited
US2512076A
Cited
US2533666A
Cited
US2560478A
Cited
US2534051A
Cited
US2455327A
Cited
US2582712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |