US2432475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil filter and conditioner
Assignee: Individual
•
Filing: 1944-08-18
•
Granted: 1947-12-09
•
Expires: 1964-08-18
Abstract
No abstract record available.
Inventors
- 👤 Frank H Griffith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:02
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/18; B01D27/00; B01D27/02; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/56; B01D29/58; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189802424A
Cited
US1760340A
Cited
US1750073A
Cited
US1997746A
Cited
US2337238A
Cited
US2294107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-08 | 1951-06-09 | 1951-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-08 | 1955-06-09 | 1955-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-08 | 1959-06-09 | 1959-12-09 | $7700.00 | Window Closed / Lapsed |