Patent US3768981A successfully refreshed from Google Patents.
US3768981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auto exhaust scrubber with catalyst
Assignee: Individual
•
Filing: 1971-02-16
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Granted: 1973-10-30
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Expires: 1991-02-16
Abstract
Abstract A gas scrubber for an internal combustion engine comprising a tank having an intake gas tube to which a composite cylindrical filter formed of a plurality of screens is secured. A clean gas outlet is provided at the top of the tank and a pump is provided in the tank for pumping scrubbing liquid from the interior of the tank back into the filter so that the gas to be scrubbed mixes with the scrubbing liquid and passes through the filter with the scrubbing liquid.
Inventors
- 👤 H Alliger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:20
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/9454; B01D53/922; B01D53/925; F; F01; F01N; F01N3/00; F01N3/02; F01N3/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A gas scrubber comprising a tank having an intake gas tube connected thereto and a clean gas outlet connected thereto, a scrubbing liquid in said tank, a filter in said tank connected to said tube, said filter being cylindrical in shape and comprising a plurality of screens arranged concentrically in abutting relationship, pump means in said tank and connected to the interior of said filter for pumping said scrubbing liquid from outside of said filter to within said filter, at least one of said screens having a catalyst coated thereon for chemically changing and entrapping noxious material, and means compressively holding said screens together, the outermost of said screens being of a relatively fine mesh, the mesh of the screens increasing inwardly so that the inner screens are increasingly of a coarser mesh with the innermost screen being of the most coarse mesh.
Claim 2
Dependent Claim
18 words
A gas scrubber according to claim 2 wherein said scrubbing liquid is an oil or an oil-water emulsion.
References Cited (Backward Citations)
US1637516A
Cited
US2138153A
Cited
US2602730A
Cited
US2677601A
Cited
US2849294A
Cited
US3032968A
Cited
US3216181A
Cited
US3391521A
Cited
US3566583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |