US2665812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid filter device
Assignee: DELPARK Corp
•
Filing: 1950-10-19
•
Granted: 1954-01-12
•
Expires: 1970-10-19
Abstract
No abstract record available.
Inventors
- 👤 Victor S Crane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:38
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/09; B01D29/60; B01D29/605; B01D29/88; B01D29/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US445371A
Cited
US794631A
Cited
US1140528A
Cited
FR551108A
Cited
US1837368A
Cited
US2097529A
Cited
US2197770A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |