US2672986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid filter
Assignee: Individual
•
Filing: 1949-03-16
•
Granted: 1954-03-23
•
Expires: 1969-03-16
Abstract
No abstract record available.
Inventors
- 👤 Lichtgarn Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:55
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/20; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/62; B01D29/64; B01D29/6469; B01D29/70; B01D29/72
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US192313A
Cited
US580561A
Cited
DE338179C
Cited
US2475561A
Cited
US1130725A
Cited
US1331900A
Cited
US1741444A
Cited
US2066479A
Cited
US2083148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |