Patent US4409908A successfully refreshed from Google Patents.
US4409908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for thermal decontamination of waste waters
Assignee: Individual
•
Filing: 1979-09-13
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Granted: 1983-10-18
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Expires: 1999-09-13
Abstract
Abstract The method according to the present invention ensures a thermal decontamination of waste waters. The method comprises passing a combustible gas through said waste waters in the presence of surfactants. Said combustible gas is passed in an amount sufficient to convert said waste waters to a combustible foam; the surfactants are added to convert the entire volume of said waste waters to the combustible foam. Then the resulting foam is subjected to combustion.
Inventors
- 👤 Petr G. Udyma
- 👤 Ionas A. Gilis
- 👤 Sergei V. Zhubrin
- 👤 Alexandr V. Sakharnov
- 👤 Boris A. Rodioov
- 👤 Vladimir V. Skornyakov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:59
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/24; C02F11/00; C02F11/06; F; F23; F23G; F23G7/00; F23G7/008; Y; Y02; Y02W; Y02W10/00; Y02W10/40; Y10; Y10S; Y10S261/00; Y10S261/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
125 words
The method for the thermal decontamination of waste waters which contain solid impurities, which comprises passing a gas which in its entirety is combustible through said waste waters in the presence of surfactants in an amount sufficient for conversion of all of said waste waters to a foam formed of foam bubbles in which said solid impurities are suspended and which contain said gas within the bubbles and is combustible due to the combustible gas, and subjecting said combustible foam to combustion, whereby the entire foam and thus all of the waste water is evaporated and the combustible gas contained in the bubbles is liberated and continues to burn as a stable flame to burn off contaminants including said solid impurities in the waste water.
Claim 2
Independent Claim
125 words
The method for the thermal decontamination of waste waters which contain solid impurities, which comprises passing a gas which in its entirety is combustible through said waste waters in the presence of surfactants in an amount sufficient for conversion of all of said waste waters to a foam formed of foam bubbles in which said solid impurities are suspended and which contain said gas within the bubbles and is combustible due to the combustible gas, and subjecting said combustible foam to combustion, whereby the entire foam and thus all of the waste water is evaporated and the combustible gas contained in the bubbles is liberated and continues to burn as a stable flame to burn off contaminants including said solid impurities in the waste water.
Claim 3
Dependent Claim
32 words
The method as claimed in claim 1, wherein said combustible gas is passed through said waste waters by bubbling under a gauge pressure to provide a moving stream of said combustible foam.
Claim 4
Dependent Claim
16 words
Method according to claim 2 wherein the gas passed through the waste waters is natural gas.
Claim 5
Dependent Claim
16 words
Method according to claim 1 wherein the gas passed through the waste waters is natural gas.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-17 | 1987-04-18 | 1987-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-17 | 1991-04-18 | 1991-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-17 | 1995-04-18 | 1995-10-18 | $7700.00 | Window Closed / Lapsed |