Patent US3918945A successfully refreshed from Google Patents.
US3918945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particulate lead trap
Assignee: PPG Industries Inc
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Filing: 1973-10-25
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Granted: 1975-11-11
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Expires: 1993-10-25
Abstract
Abstract An improved apparatus for treating automotive exhaust gases is described which involves the utilization of an agglomerating device coupled to a specially constructed fiber glass filter in series in an automotive exhaust system. The filter employed involves the utilization of fiber glass needled mat preferably in the form of layers of mat held in place so that gases passing through the exhaust system must pass through the matted fibers in their passage through the device.
Inventors
- 👤 John G Holloway
- 👤 Herbert W Barch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:50
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/0218; F01N13/00; F01N13/009; F01N3/022; F01N3/0226; F01N3/033; F01N2330/00; F01N2330/10; F01N2330/101; F01N2330/102; F01N2370/00; F01N2370/22; F01N2450/00; F01N2450/30; F01N2470/00; F01N2470/10; G; G01; G01N; G01N21/00; G01N21/84; G01N21/85; G01N2021/8557; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/25; Y10S55/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
343 words
IN AN AUTOMOTIVE EXHAUST GAS SYSTEM THE COMBINATION COMPRISING: A. A FIRST EXHAUST CONDUIT MEANS FOR CONVEYING EXHAUST GASES FROM AN INTERNAL COMBUSTION ENGINE: AN AGGLOMERATOR IN GAS COMMUNICATION WITH SAID XHAUST CONDUIT MEANS: SAID AGGLOMERATOR COMPRISED OF: A HOUSING: ANINLET TO SAID HOUSING INGAS COMMUNICATION WITH SAID FIRST EXHAUST CONDUIT MEANS: AN OUTLET FROM SAID HOUSING TO CONVEY GASES THEREFROM: A RIGID SUPPORT MEMBER WITHIN SAID HOUSING IN GAS COMMUNICATION ANDINTERAL WITH SAID INLET, SAID RIGID SUPPORT MEMBER HAVING APERTURES THEREIN FOR PASSING GASES THROUGHOUT SAID INLET AND THROUGH SAID SUPPORT MEMBER: A GLASS FIBER MAT DISPOSED ABOUT AND IN CONTACT WITH SAID RIGID SUPPORT MEMBER TO AGGLOMERATE PARTICULATES FROM SAID EXHAUST GASES, SAID GLASS FIBER MAT HAVING THEREON A BINDER CAPABLE OF WITHSTANDING 900*F: A POROUS RIGID SLEEVE DISPOSED ABOUT SAID GLASS FIBER MAT TO PROVIDE SUPPORT TO SAID GLASS FIBER MAT AND SPACED APART FROM SAID HOUSING TO PROVIDE A GAS DISTRIBUTION ZONE BETWEEN SAID GLASS FIBER AND THE INTERIOR OF SAID HOUSING SAID AGGLOMERATOR CONSTRUCTED TO AGGLOMERATE THE PARTICULATES IN SAID EXHAUST GASES: A SECOND EXHAUST GAS CONDUIT MEANS, ONE END THEREOF BEING IN GAS COMMUNICATION WITH THE OUTLLET OF SAID AGGLOMERA TOR: A FILTER IN GAS COMMUNICATION WITH THE OPOSITE END OF SAID SECOND EXHAYST CONDUIT MEANS, SAID FILTER COMPRISES OF: A HOUSING: AN INLET TO SAID HOUSING IN AS CONNUNICATION WITH SAID SECOND EXHAUST CONDUIT MEANS AT ONE END OPPOITE SAID AGGLOMERATOR: AN OUTLET FROM SAID HOUSING TO CONVEY GASES THEREFROM, A RIGID SUPPORT MEMBER WITHIN SAID HOUSING IN GAS COMMUNICATION AND INTERGAL WITH SAID INLET, SAID SUPPORT MEMBER HAVING APERTURES THEREIN FOR PASSING GASES THROUGH SAID SUPPORT MEMBER: A GLASS FIBER MAT DISPOSED ABOUT AND IN CONTACT WITH SAID RIGID SUPPORT MEMBER TO FILTER PARES FROM SAID EXHAUST GASES SAID FIBER MAT HAVING THEREON A BINDER CAPABLE OF WITHSTANDING 500*F: A POROUS RIGID SLEEVE DISPOSED ABOUT SAID FIBER MAT SPACED APART FROM SAID HOUSING TO PROVIDE A GAS DISTRIBUTION ZON THE INTERIOR ODF SAID HOUSING: SAID FILTER BEING CONSTRUCTED TO, REMOVED PARTICULARS IN SAID EXHAUST GASES.
Claim 2
Dependent Claim
343 words
IN AN AUTOMOTIVE EXHAUST GAS SYSTEM THE COMBINATION COMPRISING: A. A FIRST EXHAUST CONDUIT MEANS FOR CONVEYING EXHAUST GASES FROM AN INTERNAL COMBUSTION ENGINE: AN AGGLOMERATOR IN GAS COMMUNICATION WITH SAID XHAUST CONDUIT MEANS: SAID AGGLOMERATOR COMPRISED OF: A HOUSING: ANINLET TO SAID HOUSING INGAS COMMUNICATION WITH SAID FIRST EXHAUST CONDUIT MEANS: AN OUTLET FROM SAID HOUSING TO CONVEY GASES THEREFROM: A RIGID SUPPORT MEMBER WITHIN SAID HOUSING IN GAS COMMUNICATION ANDINTERAL WITH SAID INLET, SAID RIGID SUPPORT MEMBER HAVING APERTURES THEREIN FOR PASSING GASES THROUGHOUT SAID INLET AND THROUGH SAID SUPPORT MEMBER: A GLASS FIBER MAT DISPOSED ABOUT AND IN CONTACT WITH SAID RIGID SUPPORT MEMBER TO AGGLOMERATE PARTICULATES FROM SAID EXHAUST GASES, SAID GLASS FIBER MAT HAVING THEREON A BINDER CAPABLE OF WITHSTANDING 900*F: A POROUS RIGID SLEEVE DISPOSED ABOUT SAID GLASS FIBER MAT TO PROVIDE SUPPORT TO SAID GLASS FIBER MAT AND SPACED APART FROM SAID HOUSING TO PROVIDE A GAS DISTRIBUTION ZONE BETWEEN SAID GLASS FIBER AND THE INTERIOR OF SAID HOUSING SAID AGGLOMERATOR CONSTRUCTED TO AGGLOMERATE THE PARTICULATES IN SAID EXHAUST GASES: A SECOND EXHAUST GAS CONDUIT MEANS, ONE END THEREOF BEING IN GAS COMMUNICATION WITH THE OUTLLET OF SAID AGGLOMERA TOR: A FILTER IN GAS COMMUNICATION WITH THE OPOSITE END OF SAID SECOND EXHAYST CONDUIT MEANS, SAID FILTER COMPRISES OF: A HOUSING: AN INLET TO SAID HOUSING IN AS CONNUNICATION WITH SAID SECOND EXHAUST CONDUIT MEANS AT ONE END OPPOITE SAID AGGLOMERATOR: AN OUTLET FROM SAID HOUSING TO CONVEY GASES THEREFROM, A RIGID SUPPORT MEMBER WITHIN SAID HOUSING IN GAS COMMUNICATION AND INTERGAL WITH SAID INLET, SAID SUPPORT MEMBER HAVING APERTURES THEREIN FOR PASSING GASES THROUGH SAID SUPPORT MEMBER: A GLASS FIBER MAT DISPOSED ABOUT AND IN CONTACT WITH SAID RIGID SUPPORT MEMBER TO FILTER PARES FROM SAID EXHAUST GASES SAID FIBER MAT HAVING THEREON A BINDER CAPABLE OF WITHSTANDING 500*F: A POROUS RIGID SLEEVE DISPOSED ABOUT SAID FIBER MAT SPACED APART FROM SAID HOUSING TO PROVIDE A GAS DISTRIBUTION ZON THE INTERIOR ODF SAID HOUSING: SAID FILTER BEING CONSTRUCTED TO, REMOVED PARTICULARS IN SAID EXHAUST GASES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |