US3869267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust gas filter
Assignee: Individual
•
Filing: 1973-09-04
•
Granted: 1975-03-04
•
Expires: 1993-09-04
Abstract
Abstract This exhaust gas filter includes a cylindrical body formed from a fibrous filter material which is supported by a central core member attached to a base member. The body is adapted for insertion into an automobile tail pipe and the filter is attached to the tail pipe by means of a clamp provided by the base member. A removable cellephane cover is provided to facilitate installation and handling.
Inventors
- 👤 Josephine Gaylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:16
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; F; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/0211; F01N2330/00; F01N2330/10; F01N2330/101; F01N2330/102; F01N2450/00; F01N2450/30; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
A gas filter for an exhaust pipe comprising: a. a body of fibrous filter material having a non-rigid periphery adapted to be received in the exhaust pipe, b. a base member at one end of said body including a screen and an exhaust pipe mounting means, and c. an elongate core member within said body attached to said base member in cantilever relation and extending substantially the length of said body to support said fibrous material and substantially expose the transverse area of the other end of said body to permit substantially unimpeded longitudinal flow of gas through the fibrous material.
Claim 2
Dependent Claim
101 words
A gas filter for an exhaust pipe comprising: a. a body of fibrous filter material having a non-rigid periphery adapted to be received in the exhaust pipe, b. a base member at one end of said body including a screen and an exhaust pipe mounting means, and c. an elongate core member within said body attached to said base member in cantilever relation and extending substantially the length of said body to support said fibrous material and substantially expose the transverse area of the other end of said body to permit substantially unimpeded longitudinal flow of gas through the fibrous material.
Claim 3
Dependent Claim
42 words
A filter as defined in claim 1, in which: d. the core member is a helical wire having a plurality of turns holding the fibrous material by transverse engagement therewithin and tending to restrain the body against longitudinal movement along the wire.
Claim 4
Dependent Claim
126 words
A gas filter for an exhaust pipe comprising: a. a body of fibrous filter material having a generally cylindrical configuration with a non-rigid periphery adapted to be received in radially compressible relation within the exhaust pipe, b. a base member at one end of said body including a screen having a plurality of mesh apertures and an exhaust pipe mounting means, and c. an elongate helical wire core member attached to said base member and extending substantially the length of said body to support said fibrous material said wire having a plurality of turns holding the fibrous material and tending to restrain the body against longitudinal movement said helical wire being attached to the base member by threading the helical wire through a screen mesh aperture.
Claim 5
Dependent Claim
126 words
A gas filter for an exhaust pipe comprising: a. a body of fibrous filter material having a generally cylindrical configuration with a non-rigid periphery adapted to be received in radially compressible relation within the exhaust pipe, b. a base member at one end of said body including a screen having a plurality of mesh apertures and an exhaust pipe mounting means, and c. an elongate helical wire core member attached to said base member and extending substantially the length of said body to support said fibrous material said wire having a plurality of turns holding the fibrous material and tending to restrain the body against longitudinal movement said helical wire being attached to the base member by threading the helical wire through a screen mesh aperture.
Claim 6
Dependent Claim
152 words
A gas filter for an exhaust pipe, comprising: a. a body of fibrous filter material having a generally cylindrical configuration with a non-rigid periphery adapted to be received in radially compressible relation within the exhaust pipe, b. a base member at one end of the body including a wire mesh screen and a circumferentially adjustable clamping band adapted to clamp the base member to the exhaust pipe, and c. an elongate core member substantially coaxial and coextensive with said body to support the fibrous material said core member being attached to said base member at one end in cantilever relation in a manner to substantially expose the transverse area of the other end of said body to permit substantially unimpeded longitudinal flow of gas through the fibrous material said core member having transverse engagement portions extending into the fibrous body tending to restrain the body against longitudinal movement along the core member.
Claim 7
Dependent Claim
152 words
A gas filter for an exhaust pipe, comprising: a. a body of fibrous filter material having a generally cylindrical configuration with a non-rigid periphery adapted to be received in radially compressible relation within the exhaust pipe, b. a base member at one end of the body including a wire mesh screen and a circumferentially adjustable clamping band adapted to clamp the base member to the exhaust pipe, and c. an elongate core member substantially coaxial and coextensive with said body to support the fibrous material said core member being attached to said base member at one end in cantilever relation in a manner to substantially expose the transverse area of the other end of said body to permit substantially unimpeded longitudinal flow of gas through the fibrous material said core member having transverse engagement portions extending into the fibrous body tending to restrain the body against longitudinal movement along the core member.
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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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |