Patent US1121426A successfully refreshed from Google Patents.
Patent US1955536A successfully refreshed from Google Patents.
Patent US4616978A successfully refreshed from Google Patents.
Patent US1878295A successfully refreshed from Google Patents.
Patent US2505375A successfully refreshed from Google Patents.
US2505375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplex fluid strainer
Assignee: Bethlehem Steel Corp
•
Filing: 1948-12-28
•
Granted: 1950-04-25
•
Expires: 1968-12-28
Abstract
No abstract record available.
Inventors
- 👤 John C Wohlfarth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:42
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/12; Y; Y10; Y10T; Y10T137/00; Y10T137/794; Y10T137/7976; Y10T137/8593; Y10T137/87096; Y10T137/87113; Y10T137/87265; Y10T137/87338; Y10T137/87362
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US218351A
Cited
US1627186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |