US3979283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microbial degradation of DDT
Assignee: Bioteknika International Inc
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Filing: 1974-09-25
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Granted: 1976-09-07
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Expires: 1994-09-25
Abstract
Abstract A process for the microbial degradation of DDT which comprises treating the DDT with certain nonpathogenic, hydrocarbon-utilizing strains of Nocardia, Candida and penicillium until the DDT has been substantially degraded. The process is effective for degrading DDT as it may be present as a pollutant or contaminant in water, in industrial effluents, in various land areas such as industrial sites and the like or in varied laboratory or commercial installations. The process may also be used to clean up and degrade mixtures of DDT and various hydrocarbon oils or petrochemicals wherever their presence constitutes a deleterious pollutant.
Inventors
- 👤 Carolina M. Prudom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:58
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/34; C12; C12N; C12N1/00; C12N1/14; C12N1/145; C12R; C12R2001/00; C12R2001/645; C12R2001/80; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/909; Y10S210/918; Y10S210/922; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/872; Y10S435/911; Y10S435/921; Y10S435/923; Y10S435/933
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
30 words
A process for the microbial degradation of dichlorodiphenyl-trichloroethane (DDT) which comprises treating the DDT with Penicillium sp. ATCC 20,369 for a sufficient time until the DDT has been substantially degraded.
Claim 2
Dependent Claim
30 words
A process for the microbial degradation of dichlorodiphenyl-trichloroethane (DDT) which comprises treating the DDT with Penicillium sp. ATCC 20,369 for a sufficient time until the DDT has been substantially degraded.
Claim 3
Dependent Claim
14 words
The process of claim 1, wherein the microorganism is mixed with a cellulosic material.
Claim 4
Dependent Claim
21 words
The process of claim 1, wherein the microorganism is mixed with a cellulosic material, a nitrogen source and a phosphorus source.
Claim 5
Dependent Claim
14 words
The process of claim 1, wherein the microorganism is employed in a slurry form.
Claim 6
Dependent Claim
14 words
The process of claim 1, wherein the microorganism is employed in a pelletized form.
Claim 7
Dependent Claim
14 words
The process of claim 1, wherein the microorganism is employed in a powdered form.
Claim 8
Dependent Claim
16 words
The process of claim 1, wherein the microorganism is employed in the form of a foam.
Claim 9
Dependent Claim
33 words
The process of claim 1, wherein the DDT is contained in an aqueous solution and the microorganism is added thereto in slurry form in an amount of about 1 to 5% by volume.
Claim 10
Dependent Claim
22 words
The process of claim 1, wherein the DDT is contained in an aqueous solution which additionally contains hydrocarbon oils or other petrochemicals.
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) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |