US2681152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unloader for centrifugal machines
Assignee: Individual
•
Filing: 1949-02-23
•
Granted: 1954-06-15
•
Expires: 1969-02-23
Abstract
No abstract record available.
Inventors
- 👤 Stindt Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:54
CPC Classifications
B; B04; B04B; B04B11/00; B04B11/08; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7018; Y10T403/7021; Y10T403/7041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US373443A
Cited
US836706A
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US1113233A
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US1102530A
Cited
US1205128A
Cited
US1388173A
Cited
US2076516A
Cited
US2355901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |