US3390774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spin-on type filter with dual valve and dual filter media
Assignee: Chevron USA Inc
•
Filing: 1967-08-28
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Granted: 1968-07-02
•
Expires: 1987-08-28
Abstract
No abstract record available.
Inventors
- 👤 Neely George Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:00
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/02; B01D27/04; B01D27/06; B01D27/10; B01D27/103; B01D27/106; B01D27/14; B01D27/146; B01D27/148
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) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |