US2735550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for magnetic
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
•
Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:30
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/10; B03C1/14; B03C2201/00; B03C2201/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A FILTERING DEVICE OF THE CLASS DESCRIBED, COMPRISING: A REVOLUBLE HOLLOW DRUM; A POROUS CIRCUMFERENTIALLY EXTENDING FILTER MEMBER CARRIED BY SAID DRUM; MEANS FOR PRODUCING AN AIR PRESSURE DIFFERENTIAL ON OPPOSITE SIDES OF SAID FILTER MEMBER BY PROVIDING A SUCTION SPACE AT ONE SIDE OF SAID FILTER MEMBER; AND MAGNET MEANS DISPOSED IN PROXIMITY TO SAID FILTER MEMBER ON SAID ONE SIDE FOR AUGMENTING THE ACTION OF SAID PRESSURE DIFFERENTIAL FOR URGING MAGNETIC PARTICLES TO BE DRAWN TO SAID FILTER MEMBER.
Claim 2
Dependent Claim
81 words
A FILTERING DEVICE OF THE CLASS DESCRIBED, COMPRISING: A REVOLUBLE HOLLOW DRUM; A POROUS CIRCUMFERENTIALLY EXTENDING FILTER MEMBER CARRIED BY SAID DRUM; MEANS FOR PRODUCING AN AIR PRESSURE DIFFERENTIAL ON OPPOSITE SIDES OF SAID FILTER MEMBER BY PROVIDING A SUCTION SPACE AT ONE SIDE OF SAID FILTER MEMBER; AND MAGNET MEANS DISPOSED IN PROXIMITY TO SAID FILTER MEMBER ON SAID ONE SIDE FOR AUGMENTING THE ACTION OF SAID PRESSURE DIFFERENTIAL FOR URGING MAGNETIC PARTICLES TO BE DRAWN TO SAID FILTER MEMBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |