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Patent US3715187A successfully refreshed from Google Patents.
US3715187A
Expired / Lapsed
US
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Method of removing sulphur dioxide and nitrogen dioxide from gases
Assignee: Corning Glass Works
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Filing: 1971-04-14
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Granted: 1973-02-06
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Expires: 1991-04-14
Abstract
Abstract Method of removing SO2 and NO2 or SO2 alone from gaseous mixtures passing the gaseous mixtures through a molten bath of sodium hydroxide and/or potassium hydroxide.
Inventors
- 👤 R Bartholomew
- 👤 H Garfinkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:21
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/60; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
42 words
A method for removing sulfur dioxide and nitrogen dioxide from a gaseous environment which comprises passing the gaseous environment through a molten bath consisting initially of only at least one member selected from the group consisting of sodium hydroxide and potassium hydroxide.
Claim 2
Independent Claim
42 words
A method for removing sulfur dioxide and nitrogen dioxide from a gaseous environment which comprises passing the gaseous environment through a molten bath consisting initially of only at least one member selected from the group consisting of sodium hydroxide and potassium hydroxide.
Claim 3
Dependent Claim
21 words
The method, as claimed in claim 1 wherein the molten bath comprises an equimolar mixture of sodium hydroxide and potassium hydroxide.
Claim 4
Dependent Claim
21 words
The method, as claimed in claim 1, wherein the molten bath is maintained at a temperature between about 170* and 525*C.
References Cited (Backward Citations)
US2375758A
Cited
US3511594A
Cited
US3438722A
Cited
US3533748A
Cited
US3563029A
Cited
US3552912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |