Patent US3302177A successfully refreshed from Google Patents.
Patent US3746172A successfully refreshed from Google Patents.
US3746172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective multi-stage filtration system
Assignee: Individual
•
Filing: 1970-09-22
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Granted: 1973-07-17
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Expires: 1990-09-22
Abstract
Abstract The apparatus forming the embodiment of the system, eliminates the necessity and disadvantage of a deep-bed filter of large single capacity, and provides greatly improved performance by the provision of a plurality of inter-connected filter units, and controls therefor, each filter unit being so arranged in the system as to be adapted to use one or more filter media and to be operated at its own rate and have its own back-wash cycle, and which can receive its own dosage of chemicals or polyelectrolyte, the apparatus constituting an integrated sequential controlled system.
Inventors
- 👤 R Nebolsine
- 👤 Roman G San
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:22
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/08; B01D17/10; B01D35/00; B01D35/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
187 words
A selective multi-stage filtration system comprising a plurality of filter units, fluid feeding means including a first manifold, a first series of branch pipes leading from said manifold to each of the filter units, a second manifold and a second series of branch pipes leading therefrom to each of the filter units, valves controlling each of the first series of branch pipes, valves controlling each of the second series of branch pipes, said manifolds, branch pipes and valves being controllable to pass a fluid, fed into the system, selectively through one or a plurality of the filter units succesively and to a point of discharge from the filter units, and whereby each filter unit may be operated at its own rate of flow therethrough, and may contain a filtering medium distinct from those of others of the filter units, a series of valve controlled discharge pipes leading from the filter units, a third manifold connected to said pipes for reception of treated fluid from said filter units, and a third series of branch pipes leading from said discharge pipes and having valve-controlled communication with said second manifold.
Claim 2
Dependent Claim
187 words
A selective multi-stage filtration system comprising a plurality of filter units, fluid feeding means including a first manifold, a first series of branch pipes leading from said manifold to each of the filter units, a second manifold and a second series of branch pipes leading therefrom to each of the filter units, valves controlling each of the first series of branch pipes, valves controlling each of the second series of branch pipes, said manifolds, branch pipes and valves being controllable to pass a fluid, fed into the system, selectively through one or a plurality of the filter units succesively and to a point of discharge from the filter units, and whereby each filter unit may be operated at its own rate of flow therethrough, and may contain a filtering medium distinct from those of others of the filter units, a series of valve controlled discharge pipes leading from the filter units, a third manifold connected to said pipes for reception of treated fluid from said filter units, and a third series of branch pipes leading from said discharge pipes and having valve-controlled communication with said second manifold.
Claim 3
Dependent Claim
65 words
A selective multi-stage filtration system, constructed in accordance with claim 1 in combination with an initial receiving chamber for fluids to be treated and constituting a charging-fluid interceptor , a terminating chamber constituting a fluid separator and concentrator, valve control means for fluid flow connecting the first manifold and the charging-fluid interceptor, and valve controlled means connecting the charging-fluid interceptor and fluid separator and concentrator.
Claim 4
Dependent Claim
48 words
A selective multi-stage filtration system, constructed in accordance with claim 2, in combination with means for carrying heavier fluids from stratas of relatively heavy and lighter fluids from the fluid separator and concentrator back to the fluid interceptor for recycling through one or more of the filter units.
References Cited (Backward Citations)
US866433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |