Patent US2636642A successfully refreshed from Google Patents.
US2636642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for controlling flow of finely divided solids
Assignee: Consolidation Coal Co
•
Filing: 1950-03-04
•
Granted: 1953-04-28
•
Expires: 1970-03-04
Abstract
No abstract record available.
Inventors
- 👤 Gorin Everett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:47
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/001; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US998647A
Cited
US1212168A
Cited
US1628404A
Cited
US1664265A
Cited
US1983093A
Cited
US2475984A
Cited
US2502953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |