US2314640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant purifier
Assignee: WINSLOW ENGINEERING Co
•
Filing: 1939-02-27
•
Granted: 1943-03-23
•
Expires: 1959-02-27
Abstract
No abstract record available.
Inventors
- 👤 Charles A Winslow
- 👤 Laurence L Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:10
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/005; B01D27/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49604; Y10T29/49801
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) | 1946-03-22 | 1946-09-21 | 1947-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-03-22 | 1950-09-21 | 1951-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-03-22 | 1954-09-21 | 1955-03-23 | $7700.00 | Window Closed / Lapsed |