Patent US3427835A successfully refreshed from Google Patents.
US3561602A
Expired / Lapsed
US
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Liquid filter
Assignee: DONALD H MOLITOR
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Filing: 1968-12-18
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Granted: 1971-02-09
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Expires: 1988-12-18
Abstract
Abstract A liquid filter having a casing with liquid inlet and outlet and characterized by a filter element comprised of a multitude of absorbent cellulosic cloth discs, such as terry cloth, in compressed stacked face-to-face relation around a tube disposed between the inlet and outlet. The tube is open at one end and closed at the other and perforated along its length. The liquid to be filtered is forced to pass radially between adjacent cloth discs between the perimeters of the discs and the tube. Dissolved iron is removed from water passed through the filter if the cloth discs are saturated with potassium permanganate.
Inventors
- 👤 Donald H Molitor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:11
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/001; C02F1/003; B; B01; B01D; B01D24/00; B01D24/007; B01D24/008; B01D24/02; B01D24/10; B01D24/16; B01D24/165; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/56; B01D29/58; B01D2201/00; B01D2201/18; B01D2201/182
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
12 words
said canister being closed at opposite ends with perforated end plates, and
Claim 2
Dependent Claim
35 words
A filter according to claim 1 further characterized in that said diverter plate is a semirigid rubberlike disc in compressed stacked face-to-face relation with the outermost cloth disc adjacent the closed end of said tube.
Claim 3
Dependent Claim
42 words
A filter according to claim 2 furthEr characterized in that said means for maintaining said cloth discs under compression includes at least one coil spring disposed between the casing wall and the diverter plate and around the closed end of said tube.
Claim 4
Dependent Claim
34 words
one end of said canister being disposed in liquid tight relation with the plate means separating said chambers, whereby liquid flowing from one chamber to the next adjacent chamber is forced through said canister.
Claim 5
Dependent Claim
46 words
A filter according to claim 1 further characterized in that a coil spring is disposed between the end plate of said canister and the inside casing wall to maintain the opposite end of said canister in liquid tight relation with the plate means dividing the chambers.
Claim 6
Dependent Claim
19 words
A filter according to claim 1, further characterized in that said filter discs are composed of cotton terry cloth.
Claim 7
Dependent Claim
29 words
A filter according to claim 5 further characterized in that said compressed cloth discs are present along said tube in number between about 15 and 20 per linear inch.
Claim 8
Dependent Claim
63 words
A filter according to claim 1 further characterized in that said casing comprises: A. a hollow cylindrical casting open at one end and a complementary cover over said open end; B. sealing means are present between the casing segments to insure a liquid tight seal; and C. manually removable securing means are provided to hold said segments together for easy assembly and disassembly.
Claim 9
Dependent Claim
18 words
A filter according to claim 1 further characterized in that said cloth discs are impregnated with potassium permanganate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |