US2638838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating granular material in a continuous process
Assignee: General American Transportation Corp
•
Filing: 1947-05-16
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Granted: 1953-05-19
•
Expires: 1967-05-16
Abstract
No abstract record available.
Inventors
- 👤 Talmey Paul
- 👤 Otto R Kuster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:26
CPC Classifications
D; D21; D21C; D21C3/00; D21C3/22; D21C3/24; A; A23; A23L; A23L7/00; A23L7/10; A23L7/197; A23L7/1975
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US151034A
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US1574210A
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US1705822A
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DE618502C
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US2086181A
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US2334665A
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US2334666A
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US2439180A
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US2498573A
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US2525137A
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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 |