Patent US4294674A successfully refreshed from Google Patents.
US4294674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating waste gas by irradiation
Assignee: Ebara Corp
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Filing: 1979-12-26
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Granted: 1981-10-13
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Expires: 1999-12-26
Abstract
Abstract There is disclosed an improved method of treating waste gas by electron irradiation with ammonia being added to the waste gas, characterized in that the reaction temperature is held between 50° C. and 80° C. during the treatment.
Inventors
- 👤 Shinji Aoki
- 👤 Keita Kawamura
- 👤 Hitoshi Kimura
- 👤 Tsutomu Katayama
- 👤 Chikara Kaido
- 👤 Hiroshi Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:42
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/60; B01D53/007; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
42 words
An improved method of treating waste gas containing sulfur oxides and nitrogen oxides and having ammonia added, the waste gases being subjected to ionizing radiation characterized in that the reaction temperature is held between 50° C. and 80° C. during the treatment.
Claim 2
Dependent Claim
42 words
An improved method of treating waste gas containing sulfur oxides and nitrogen oxides and having ammonia added, the waste gases being subjected to ionizing radiation characterized in that the reaction temperature is held between 50° C. and 80° C. during the treatment.
Claim 3
Dependent Claim
36 words
A method according to claim 1 wherein the adjustment of the reaction temperature is achieved by controlling the temperature of waste gas at the inlet of a reaction vessel containing the waste gas to be irradiated.
Claim 4
Dependent Claim
30 words
A method according to claim 2 wherein the adjustment of the gas temperature is achieved by a cooling system that brings the waste gas into direct contact with a liquid.
Claim 5
Independent Claim
17 words
A method according to claims 1, 2, or 3, wherein said ionizing radiation is electron beam radiation.
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) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |