Patent US934221A successfully refreshed from Google Patents.
US934221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal machine.
Assignee: Individual
•
Filing: 1908-07-29
•
Granted: 1909-09-14
•
Expires: 1928-07-29
Abstract
No abstract record available.
Inventors
- 👤 Hugo Schmitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:01
CPC Classifications
B; B04; B04B; B04B3/00; B04B3/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1912-09-13 | 1913-03-15 | 1913-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-09-13 | 1917-03-15 | 1917-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-09-13 | 1921-03-15 | 1921-09-14 | $7700.00 | Window Closed / Lapsed |