US2787374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal classifier
Assignee: CENTRICLONE Corp
•
Filing: 1953-01-02
•
Granted: 1957-04-02
•
Expires: 1973-01-02
Abstract
No abstract record available.
Inventors
- 👤 Krebs Kellogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:41
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/02; B03; B03B; B03B5/00; B03B5/28; B03B5/30; B03B5/32; B03B5/34; B04C3/00; B04C9/00; C; C08; C08C; C08C1/00; C08C1/02; C08C1/075; C08C1/10; B04C2009/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2706045A
Cited
US1301544A
Cited
US1825157A
Cited
US1917266A
Cited
US2199015A
Cited
US2642991A
Cited
US2701642A
Cited
US2731147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |