US2993580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal separators
Assignee: American Machine and Metals Inc
•
Filing: 1957-10-09
•
Granted: 1961-07-25
•
Expires: 1977-10-09
Abstract
No abstract record available.
Inventors
- 👤 O'conor Frank
- 👤 Edward A Daubman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:34
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; B; B04; B04B; B04B11/00; B04B11/04; B04B13/00; B04B7/00; B04B7/02; B04B7/06; B04B9/00; B04B9/06; D; D06; D06F; D06F49/00; D06F49/003
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE246563C
Cited
US2004064A
Cited
US1111001A
Cited
DE336851C
Cited
US1501642A
Cited
GB567515A
Cited
US2592596A
Cited
DE942919C
Cited
US2821840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |