US5238658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust gas treatment apparatus
Assignee: Teisan KK
•
Filing: 1992-02-04
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Granted: 1993-08-24
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Expires: 2012-02-04
Abstract
Abstract An exhaust gas treatment apparatus, which comprises first and second gas adsorbing columns each having inlet and outlet pipes; and switch-over pipes connecting the first and second gas adsorbing columns being alternatively arranged in parallel to or in series with each other, the switch-over pipes having valves arranged therein.
Inventors
- 👤 Takayuki Makioka
- 👤 Kohei Fujimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:14
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D2259/00; B01D2259/40; B01D2259/40003; B01D2259/402; B01D2259/41; B01D53/0407; B01D53/0446
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
53 words
An exhaust gas treatment apparatus, which consists of first and second gas adsorbing columns each having inlet and outlet pipes; and switch-over pipes connecting the first and second gas adsorbing columns, said adsorbing columns being arranged either in parallel to or in series with each other, the switch-over pipes having valves arranged therein.
Claim 2
Dependent Claim
53 words
An exhaust gas treatment apparatus, which consists of first and second gas adsorbing columns each having inlet and outlet pipes; and switch-over pipes connecting the first and second gas adsorbing columns, said adsorbing columns being arranged either in parallel to or in series with each other, the switch-over pipes having valves arranged therein.
Claim 3
Dependent Claim
38 words
The exhaust gas treatment apparatus of claim 1, wherein the outlet pipes of the first and second gas adsorbing columns are connected with the inlet pipes of the second and first gas adsorbing columns by said switch-over pipes.
Claim 4
Dependent Claim
19 words
The exhaust gas treatment apparatus of claim 1, wherein said switch-over pipes contain at lease one shut-off valve therein.
Claim 5
Independent Claim
83 words
A method of subjecting exhaust gas to gas adsorption in a gas adsorption apparatus whereby release of untreated gas is prevented when exchanging gas adsorbing columns, which comprises treating said exhaust gas in an apparatus which consists of having first and second adsorbing columns each having inlet and outlet pipes; and switch-over pipes connecting the first and second gas adsorbing columns, said adsorbing columns being arranged either in parallel to or in series with each other, the switch-over pipes having valves arranged therein.
Claim 6
Independent Claim
83 words
A method of subjecting exhaust gas to gas adsorption in a gas adsorption apparatus whereby release of untreated gas is prevented when exchanging gas adsorbing columns, which comprises treating said exhaust gas in an apparatus which consists of having first and second adsorbing columns each having inlet and outlet pipes; and switch-over pipes connecting the first and second gas adsorbing columns, said adsorbing columns being arranged either in parallel to or in series with each other, the switch-over pipes having valves arranged therein.
Claim 7
Dependent Claim
35 words
The method of claim 4, wherein the outlet pipes of the first and second gas adsorbing columns are connected with the inlet pipes of the second and first gas adsorbing columns by said switch-over pipes.
References Cited (Backward Citations)
US4840647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-23 | 1997-02-22 | 1997-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-23 | 2001-02-22 | 2001-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-23 | 2005-02-22 | 2005-08-24 | $7700.00 | Window Closed / Lapsed |