US4200533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hyperfiltration apparatus and method of fluid treatment
Assignee: GRAVER SEPARATIONS Inc
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Filing: 1978-06-28
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Granted: 1980-04-29
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Expires: 1998-06-28
Abstract
Abstract A membrane separation apparatus utilizing hyperfiltration for permitting passage of a filtrate therethrough while rejecting a concentrated liquid medium is provided utilizing porous stainless steel membrane supports, wherein these supports are fabricated into a single pass configuration adapted for use at high pressures and substantial lengths, and wherein membrane is deposited in situ upon said supports after fabrication.
Inventors
- 👤 Joseph L. Gaddis
- 👤 Craig A. Brandon
- 👤 Donald K. Todd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:21
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/02; B01D61/08; B01D63/00; B01D63/06; B01D63/062; B01D63/063; B01D2323/00; B01D2323/40
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
175 words
A tubular hyperfiltration apparatus for increasing the concentration of an effluent in a fluid treatment process comprising: a plurality of joined porous stainless steel pipe sections fabricated so as to be joined together in end-to-end relation in series forming a continuous membrane support; said pipe sections being joined by means including welding adjacent ends thereof; a membrane deposited upon said stainless steel pipe dynamically formed from a membrane forming liquid in situ after fabrication; means introduding effluent at an inlet portion of said stainless steel pipe under pressure; said porous stainless steel pipe having sufficient strength to support its entire length under pressure making possible a single pass construction; means segmenting a plurality of said pipe sections into modules; and means joining said modules in series forming said continuous membrane support; whereby an extremely long single pass configuration for treating industrial effluent is made possible by thus utilizing porous stainless steel membrane supports which are fabricated in single pass configuration utilizing membrane deposited in situ upon the support after joining of the sections into modules.
Claim 2
Dependent Claim
175 words
A tubular hyperfiltration apparatus for increasing the concentration of an effluent in a fluid treatment process comprising: a plurality of joined porous stainless steel pipe sections fabricated so as to be joined together in end-to-end relation in series forming a continuous membrane support; said pipe sections being joined by means including welding adjacent ends thereof; a membrane deposited upon said stainless steel pipe dynamically formed from a membrane forming liquid in situ after fabrication; means introduding effluent at an inlet portion of said stainless steel pipe under pressure; said porous stainless steel pipe having sufficient strength to support its entire length under pressure making possible a single pass construction; means segmenting a plurality of said pipe sections into modules; and means joining said modules in series forming said continuous membrane support; whereby an extremely long single pass configuration for treating industrial effluent is made possible by thus utilizing porous stainless steel membrane supports which are fabricated in single pass configuration utilizing membrane deposited in situ upon the support after joining of the sections into modules.
Claim 3
Dependent Claim
21 words
The structure set forth in claim 1 including means recycling effluent from said continuous membrane support for re-use in said process.
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) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |