Patent US2668388A successfully refreshed from Google Patents.
US2668388A
Expired / Lapsed
US
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Apparatus for discharging finely divided materials under pressure
Assignee: Individual
•
Filing: 1951-07-27
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Granted: 1954-02-09
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Expires: 1971-07-27
Abstract
No abstract record available.
Inventors
- 👤 Thompson Alonzo Zeb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:38
CPC Classifications
A; A01; A01M; A01M9/00; A01M9/0092
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US425338A
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US773205A
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US1188127A
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US1282697A
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US1371343A
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US1561039A
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US1968541A
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US2212032A
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US2253802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |