US4070158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for catalytic purification of exhaust gases
Assignee: Volkswagen AG
•
Filing: 1975-04-30
•
Granted: 1978-01-24
•
Expires: 1995-04-30
Abstract
Abstract A catalytic unit for treating gases, particularly exhaust gases of internal combustion engines, comprising a housing, adapted to be connected in an exhaust gas line, and a monolithic carrier body provided with a catalytic agent. The carrier body is mounted within the housing by an intermediate layer arranged in compression between the circumferential surface of the carrier body and the housing. The intermediate layer is so compressed by the surrounding housing that it exerts a pressure on the surface of the carrier body in the range of 20 to 80 N/cm 2 .
Inventors
- 👤 Johann Siebels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:45
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/2853; B; B23; B23P; B23P2700/00; B23P2700/03; F01N2450/00; F01N2450/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49345
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
In a catalytic purification of exhaust gases from an internal combustion engine, said unit comprising a housing adapted to be connected in an exhaust gas line, a monolithic carrier body provided with a catalytic agent and arranged in said housing, and an intermediate layer arranged in compression between the circumferential surface of the carrier body and the housing; the improvement wherein said intermediate layerexerts a pressure on the surface of said carrier body in the range of 20 to 80 N/cm 2 created by said housing compressing said intermediate layer against said carrier body.
Claim 2
Dependent Claim
94 words
In a catalytic purification of exhaust gases from an internal combustion engine, said unit comprising a housing adapted to be connected in an exhaust gas line, a monolithic carrier body provided with a catalytic agent and arranged in said housing, and an intermediate layer arranged in compression between the circumferential surface of the carrier body and the housing; the improvement wherein said intermediate layerexerts a pressure on the surface of said carrier body in the range of 20 to 80 N/cm 2 created by said housing compressing said intermediate layer against said carrier body.
References Cited (Backward Citations)
US3065595A
Cited
US3692497A
Cited
US3798006A
Cited
US3861881A
Cited
US3854888A
Cited
US3841842A
Cited
US3912459A
Cited
US3852042A
Cited
US3958312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |