US2998137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal screen
Assignee: Individual
•
Filing: 1959-02-13
•
Granted: 1961-08-29
•
Expires: 1979-02-13
Abstract
No abstract record available.
Inventors
- 👤 Vane Zdenek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:16
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/08; B07B7/086; B01; B01D; B01D29/00; B01D29/11; B07B11/00; B07B11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2855099A
Cited
GB800745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |