US2736433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter cartridge and method of making the same
Assignee: HOUDAILLE HERSHEY OF INDIANA I
•
Filing: 1952-02-07
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Granted: 1956-02-28
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Expires: 1972-02-07
Abstract
No abstract record available.
Inventors
- 👤 Sylvester J Fresch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:35
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/50; B01D29/56; B01D29/58; B01D2201/00; B01D2201/18; B01D2201/182; B01D2201/188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN A FILTER CARTRIDGE, A FILTER MEDIUM FORMED INTO SUBSTANTIALLY THE SHAPE OF A HOLLOW CYLINDER, A REMOVABLE SMOOTH SURFACED TEMPORARY TUBE OF COMPARATIVELY RIGID MATERIAL INSIDE SAID CYLINDRICAL MEDIUM, SAID TUBE BEING OF SUFFICIENT LENGTH TO SLIDE OUT OF SAID MEDIUM AND A FABRIC TUBE BETWEEN THE MEDIUM AND SAID TEMPORARY TUBE, ONE END OF THE FABRIC TUBE BEING REVERSELY TURNED AND STRETCHED OVER AN END AND A SHORT PORTION OF THE SIDE OF THE MEDIUM, THE OTHER END OF THE FABRIC TUBE BEING REVERSELY TURNED AND STRETCHED OVER THE ENTIRE OUTER SURFACE OF THE MEDIUM, OVER THE FIRST TUBE END AND TUCKED IN BE-
Claim 2
Dependent Claim
106 words
IN A FILTER CARTRIDGE, A FILTER MEDIUM FORMED INTO SUBSTANTIALLY THE SHAPE OF A HOLLOW CYLINDER, A REMOVABLE SMOOTH SURFACED TEMPORARY TUBE OF COMPARATIVELY RIGID MATERIAL INSIDE SAID CYLINDRICAL MEDIUM, SAID TUBE BEING OF SUFFICIENT LENGTH TO SLIDE OUT OF SAID MEDIUM AND A FABRIC TUBE BETWEEN THE MEDIUM AND SAID TEMPORARY TUBE, ONE END OF THE FABRIC TUBE BEING REVERSELY TURNED AND STRETCHED OVER AN END AND A SHORT PORTION OF THE SIDE OF THE MEDIUM, THE OTHER END OF THE FABRIC TUBE BEING REVERSELY TURNED AND STRETCHED OVER THE ENTIRE OUTER SURFACE OF THE MEDIUM, OVER THE FIRST TUBE END AND TUCKED IN BE-
References Cited (Backward Citations)
US633368A
Cited
US2098102A
Cited
US2196821A
Cited
US2200795A
Cited
US2209180A
Cited
US2314640A
Cited
US2301121A
Cited
US2345849A
Cited
US2375345A
Cited
US2394895A
Cited
US2550853A
Cited
US2547857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |