Patent US4213191A successfully refreshed from Google Patents.
Patent US2344590A successfully refreshed from Google Patents.
US2344590A
Expired / Lapsed
US
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Spiral oil filter
Assignee: OIL DEVICES
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Filing: 1941-03-13
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Granted: 1944-03-21
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Expires: 1961-03-13
Abstract
No abstract record available.
Inventors
- 👤 James L Breese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:23
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/44; B01D29/46; B01D29/48; B01D29/50; B01D29/56; B01D29/60; B01D29/605; B01D35/00; B01D35/12; B01D2201/00; B01D2201/30; B01D2201/301; B01D2201/306; B01D37/00; B01D37/04
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) | 1947-03-21 | 1947-09-20 | 1948-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-03-21 | 1951-09-20 | 1952-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-03-21 | 1955-09-20 | 1956-03-21 | $7700.00 | Window Closed / Lapsed |