Patent US3467256A successfully refreshed from Google Patents.
US3467256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-density screw-on throw away type filter
Assignee: Dana Inc
•
Filing: 1967-07-18
•
Granted: 1969-09-16
•
Expires: 1987-07-18
Abstract
No abstract record available.
Inventors
- 👤 Kingsley E Humbert Jr
- 👤 Lewis M Hough Jr
- 👤 Paul L Francois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:41
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/04; B01D27/06; B01D27/10; B01D27/103; B01D27/106; B01D27/14; B01D27/142; B01D27/144; B01D2201/00; B01D2201/12; B01D2201/122
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA640690A
Cited
GB588224A
Cited
US2638228A
Cited
US2675127A
Cited
US2750042A
Cited
US3000505A
Cited
US3021955A
Cited
US2998138A
Cited
US3061101A
Cited
US3235085A
Cited
US3283904A
Cited
US3297162A
Cited
US3211292A
Cited
US3269541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |