Patent US2667271A successfully refreshed from Google Patents.
US2667271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid filter
Assignee: Individual
•
Filing: 1951-11-13
•
Granted: 1954-01-26
•
Expires: 1971-11-13
Abstract
No abstract record available.
Inventors
- 👤 Charles M Tursky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:32
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/20; B01D29/00; B01D29/50; B01D29/52; B01D29/62; B01D29/70; B01D29/72; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0453
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US520293A
Cited
DE589993C
Cited
US1226307A
Cited
US2387368A
Cited
US2383672A
Cited
GB572996A
Cited
US2400201A
Cited
US2487769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |