Patent US3674154A successfully refreshed from Google Patents.
US3674154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtration apparatus
Assignee: Specialty Materials Inc
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Filing: 1968-05-20
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Granted: 1972-07-04
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Expires: 1988-05-20
Abstract
Abstract A fluid wash filter in which the stream of fluid is partially diverted transversely through a screen arranged along the axis of flow including means for reducing the concentration of contaminant along the screen.
Inventors
- 👤 Marcel Clarence Sicard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:54
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/25; B01D29/50; B01D29/52; B01D29/54; B01D29/88; B01D29/90; B01D29/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A wash filter having two tubular filter members arranged in tandem and comprising, seriatim, a. an annular inlet fitting affording support for the inlet end of; b. a first filter tube having a foraminous wall supported at its outlet end by; c. an annular coupling affording support for the inlet end of; d. a second filter tube having a foraminous wall and a smaller diameter than said first filter tube; said inlet fitting having a divergent passage for conducting a diverging stream of fluid into said first tube, and; said coupling having a convergent-divergent passage contracting from its entrance facing said first tube to a throat of smaller diameter than the inside diameter of said second tube and expanding from said throat toward said second tube.
Claim 2
Dependent Claim
126 words
A wash filter having two tubular filter members arranged in tandem and comprising, seriatim, a. an annular inlet fitting affording support for the inlet end of; b. a first filter tube having a foraminous wall supported at its outlet end by; c. an annular coupling affording support for the inlet end of; d. a second filter tube having a foraminous wall and a smaller diameter than said first filter tube; said inlet fitting having a divergent passage for conducting a diverging stream of fluid into said first tube, and; said coupling having a convergent-divergent passage contracting from its entrance facing said first tube to a throat of smaller diameter than the inside diameter of said second tube and expanding from said throat toward said second tube.
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |