Patent US5178769A successfully refreshed from Google Patents.
US5178769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter for removing liquid hydrocarbons from water and process of removing gaseous and/or hydrocarbons from water
Assignee: HYDROCABON FILTRATION SYSTEMS Inc
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Filing: 1990-12-12
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Granted: 1993-01-12
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Expires: 2010-12-12
Abstract
Abstract A filter for removing at least one hydrocarbon from water is disclosed where the active filter medium is fibrous peat which has been dried to a water content of 5 wt. % or less. A process for removing at least one hydrocarbon from contaminated water involves contacting the contaminated water with peat as described above. A filter assembly is also disclosed where at least two of the filters as described above are connected in series.
Inventors
- 👤 Stewart A. Simpson
- 👤 Rock D. Dicke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:52
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/08; B01D17/02; B01D17/0202; B01D39/00; B01D39/02; B01D39/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
67 words
A packed filter for removing at least one hydrocarbon from water contaminated with said liquid hydrocarbon which comprises a filter casing, an inlet for said contaminated water and an outlet for said contaminated water, said filter casing having contained therein fibrous spaghnum peat which has been dried to a water content of 5 wt. % or less based on the weight of said peat and the water.
Claim 2
Dependent Claim
67 words
A packed filter for removing at least one hydrocarbon from water contaminated with said liquid hydrocarbon which comprises a filter casing, an inlet for said contaminated water and an outlet for said contaminated water, said filter casing having contained therein fibrous spaghnum peat which has been dried to a water content of 5 wt. % or less based on the weight of said peat and the water.
Claim 3
Dependent Claim
60 words
The filter of claim 1 which further comprises inside said casing first means oriented to introduce a first stream of said contaminated water into said peat and second means oriented substantially perpendicular to said first means to introduce a second stream of said contaminated water into said peat in a direction substantially perpendicular to said first stream of contaminated water.
Claim 4
Dependent Claim
53 words
A process for removing at least one hydrocarbon from contaminated water which comprises contacting said contaminated water with fibrous spaghnum peat, said peat having been dried to a moisture content of 5% or less based on the weight of the peat and the water, said peat absorbing said hydrocarbon from said contaminated water.
Claim 5
Dependent Claim
53 words
A process for removing at least one hydrocarbon from contaminated water which comprises contacting said contaminated water with fibrous spaghnum peat, said peat having been dried to a moisture content of 5% or less based on the weight of the peat and the water, said peat absorbing said hydrocarbon from said contaminated water.
Claim 6
Dependent Claim
55 words
The process of claim 3, wherein said contacting of said contaminated water with said peat comprises an initial contacting of said contaminated water with said peat under turbulent conditions, whereby channels which permit said contaminated water to flow through said peat during subsequent non-turbulent contacting of said contaminated water with said peat can be conducted.
Claim 7
Dependent Claim
29 words
The process of claim 4, wherein said turbulent contacting is achieved by introducing two streams of said contaminated water into said peat at directions substantially perpendicular to each other.
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) | 1996-01-12 | 1996-07-13 | 1997-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-12 | 2000-07-13 | 2001-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-12 | 2004-07-13 | 2005-01-12 | $7700.00 | Window Closed / Lapsed |