US2216442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal separator
Assignee: —
•
Filing: —
•
Granted: 1940-10-01
•
Expires: 1957-10-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:54
CPC Classifications
B; B04; B04B; B04B11/00; B04B11/08; B04B11/082; B04B1/00; B04B1/04; B04B1/08; F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2205; F04D29/2216; F04D29/26; F04D29/28; F04D29/30; F16; F16K; F16K3/00; F16K3/02; F16K3/12; F16K3/14; F16K3/30; F16K3/314; F16K39/00; F16K39/04; Y; Y10; Y10S; Y10S494/00; Y10S494/90
Claims Analysis
Total Claims: 0
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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) | 1943-10-01 | 1944-04-01 | 1944-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-01 | 1948-04-01 | 1948-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-01 | 1952-04-01 | 1952-10-01 | $7700.00 | Window Closed / Lapsed |