US4954258A
Expired / Lapsed
US
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Microbiological degradation of halogenated hydrocarbons in water
Assignee: Individual
•
Filing: 1988-11-10
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Granted: 1990-09-04
•
Expires: 2008-11-10
Abstract
Abstract Halogenated aliphatic hydrocarbons in water are degraded by methanotrophic bacteria in the presence of oxygen and at least one lower alkanol as a carbon source.
Inventors
- 👤 C. Deane Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:35
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/1231; C02F3/34; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
61 words
In the process of degrading halogenated aliphatic hydrocarbons by the aerobic growth in water of methanotrophic bacteria in the presence of a source of oxygen and an alkane as the principal carbon source, the improvement which comprises substituting at least a growth stimulating quantity of at least one lower alkanol as a carbon source for a substantial quantity of said alkane.
Claim 2
Dependent Claim
61 words
In the process of degrading halogenated aliphatic hydrocarbons by the aerobic growth in water of methanotrophic bacteria in the presence of a source of oxygen and an alkane as the principal carbon source, the improvement which comprises substituting at least a growth stimulating quantity of at least one lower alkanol as a carbon source for a substantial quantity of said alkane.
Claim 3
Dependent Claim
12 words
The process according to claim 1 wherein said lower alkanol is methanol.
Claim 4
Dependent Claim
15 words
The process according to claim 2 wherein all of said alkane is replaced with methanol.
Claim 5
Dependent Claim
30 words
The process according to claim 2 wherein said aerobic growth is initiated in the presence of methane followed by the replacement, or partial replacement, of methane introduction by methanol introduction.
Claim 6
Dependent Claim
36 words
The process according to claim 1 wherein said halogenated aliphatic hydrocarbons includes at least one member selected from the group consisting of dichloromethane, carbon tetrachloride, 1,2-dibromoethane, 1,2-dichloroethane, 1,1-dichloroethane, 1,1,2-trichloroethane, 1,1,1-trichloroethane, 1,2-dichloroethylene, 1,1,2-trichloroethylene, tetrachloroethylene, and vinyl chloride.
Claim 7
Dependent Claim
15 words
The process according to claim 4 wherein said halogenated aliphatic hydrocarbons includes at least 1,1,2-trichloroethylene.
Claim 8
Dependent Claim
43 words
The process of degrading 1,1,2-trichloroethylene in water by allowing at least one methanotrophic bacteria to grow in the water in the presence of a source of oxygen and at least a growth stimulating quantity of methanol as substantially the sole source of carbon.
Claim 9
Dependent Claim
43 words
The process of degrading 1,1,2-trichloroethylene in water by allowing at least one methanotrophic bacteria to grow in the water in the presence of a source of oxygen and at least a growth stimulating quantity of methanol as substantially the sole source of carbon.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |