Patent US3760708A successfully refreshed from Google Patents.
Patent US2994403A successfully refreshed from Google Patents.
US2994403A
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Lubricant purifying unit
Assignee: Individual
•
Filing: 1958-04-21
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Granted: 1961-08-01
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Expires: 1978-04-21
Abstract
No abstract record available.
Inventors
- 👤 Charles A Winslow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:35
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/22; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/52; B01D29/54; B01D29/88; B01D29/90; B01D29/908; B01D35/14; B01D35/147; B01D36/00; B01D36/001; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0446; B01D2201/0453; B01D2201/0461
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |