US3348685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter apparatus and filter aid feeding and controlling system
Assignee: Phillips Petroleum Co
•
Filing: 1964-09-02
•
Granted: 1967-10-24
•
Expires: 1984-09-02
Abstract
No abstract record available.
Inventors
- 👤 Neil C Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:58
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; B; B01; B01D; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2934448A
Cited
US3023764A
Cited
US3116242A
Cited
US3200105A
Cited
FR1279345A
Cited
US3214369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |