US3352418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remountable separator screen
Assignee: Southwestern Engineering Co
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Filing: 1966-10-17
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Granted: 1967-11-14
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Expires: 1986-10-17
Abstract
No abstract record available.
Inventors
- 👤 Douglas M Swallow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:29
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46; B07B1/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A SEPARATOR SCREEN COMPRISING: (A) AN INNER CIRCULAR HOLLOW FRAME INCLUDING CYLINDRICAL AND OUTER WALLS AND CIRCULAR TOP AND BOTTOM WALLS EXTENDING RADIALLY THEREBETWEEN, SAID BOTTOM WALL PROJECTING RADIALLY OUTWARD BEYOND SAID OUTER WALL TO FORM A FIRST FLANGE; (B) AN OUTER CIRCULAR FRAME CONFRONTING SAID INNER FRAMES, SAID OUTER FRAME INCLUDING (1) A CYLINDRICAL WALL CONFRONTING A PORTION OF SAID OUTER WALL, (2) A CIRCULAR INNER SECOND FLANGE OVERLYING SAID TOP WALL, (3) A FOLDED OUTER THIRD FLANGE FORMING A SEMICIRCULAR BEAD, THE EXTREMITY OF WHICH CONFRONTS SAID FIRST FLANGE;
Claim 2
Dependent Claim
91 words
A SEPARATOR SCREEN COMPRISING: (A) AN INNER CIRCULAR HOLLOW FRAME INCLUDING CYLINDRICAL AND OUTER WALLS AND CIRCULAR TOP AND BOTTOM WALLS EXTENDING RADIALLY THEREBETWEEN, SAID BOTTOM WALL PROJECTING RADIALLY OUTWARD BEYOND SAID OUTER WALL TO FORM A FIRST FLANGE; (B) AN OUTER CIRCULAR FRAME CONFRONTING SAID INNER FRAMES, SAID OUTER FRAME INCLUDING (1) A CYLINDRICAL WALL CONFRONTING A PORTION OF SAID OUTER WALL, (2) A CIRCULAR INNER SECOND FLANGE OVERLYING SAID TOP WALL, (3) A FOLDED OUTER THIRD FLANGE FORMING A SEMICIRCULAR BEAD, THE EXTREMITY OF WHICH CONFRONTS SAID FIRST FLANGE;
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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |