US3737384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decomposition of halogenated organic compounds using metallic couples
Assignee: United States Department of the Interior
•
Filing: 1970-12-23
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Granted: 1973-06-05
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Expires: 1990-12-23
Abstract
Abstract Halogenated organic compounds, especially chlorinated organic pesticides, are decomposed by reaction with metallic couples in a mildly acidic environment.
Inventors
- 👤 K Sweeny
- 👤 J Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:26
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/70; C02F1/705; C02F2101/00; C02F2101/30; C02F2101/36; C02F2101/363
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
23 words
The process of claim 1 wherein the metallic couple is chosen from the group consisting of zinc-copper, zinc-silver, aluminum-copper, iron-copper, magnesium-copper and cadmium-copper.
Claim 2
Dependent Claim
28 words
The process of claim 2 wherein the chlorinated organic pesticide is DDT and wherein the metallic couple is chosen from the group consisting of zinc-copper, aluminum-copper and iron-copper.
Claim 3
Dependent Claim
26 words
The process of claim 3 wherein the process is carried out in aqueous medium at a pH within the range of about 1.5 to about 4.
Claim 4
Dependent Claim
23 words
The process of claim 4 wherein the aqueous medium is acidified with an acid chosen from the group of sulfuric and hydrochloric acids.
Claim 5
Dependent Claim
24 words
The process of claim 5 wherein the reaction is carried out at a temperature in the range of about 20* to about 80* C.
Claim 6
Dependent Claim
18 words
The process of claim 6 wherein the DDT in aqueous medium comprises a waste water from DDT manufacture.
References Cited (Backward Citations)
US3391204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |