Patent US18116A successfully refreshed from Google Patents.
Patent US2638837A successfully refreshed from Google Patents.
US2638837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating granular material in a continuous process
Assignee: General American Transportation Corp
•
Filing: 1948-04-26
•
Granted: 1953-05-19
•
Expires: 1968-04-26
Abstract
No abstract record available.
Inventors
- 👤 Talmey Paul
- 👤 Richard W Landon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:02
CPC Classifications
D; D21; D21C; D21C3/00; D21C3/22; D21C3/24; A; A23; A23L; A23L5/00; A23L5/10; A23L5/13; A23L7/00; A23L7/10; A23L7/196; A23L7/197; A23L7/1975
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US433399A
Cited
US44151A
Cited
US1169599A
Cited
US1346898A
Cited
US1574210A
Cited
FR691475A
Cited
US2086181A
Cited
DE722295C
Cited
US2183837A
Cited
US2195165A
Cited
US2358251A
Cited
US2317532A
Cited
CH234921A
Cited
US2460605A
Cited
US2462019A
Cited
US2498836A
Cited
US2534648A
Cited
US2515137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |