US4810588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonnesting, straight corrugation metal foil and method for making same
Assignee: CORNELISON RICHARD C dba CAMET Co
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Filing: 1988-05-24
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Granted: 1989-03-07
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Expires: 2008-05-24
Abstract
Abstract There is provided a substantially nonnesting corrugated catalytically active thin metal foil suitable for making a monolith which when encased in a housing and inserted in the exhaust line, e.g., an automobile exhaust line, will remove pollutants in the exhaust. The device is rendered substantially nonnesting by forming the corrugations according to guidelines and which corrugations are perpendicular to the longitudinal marginal edges of the metal foil. The pressure drop through the device is thus minimized and the necessity for a flat foil co-laminate is avoided.
Inventors
- 👤 Wesley P. Bullock
- 👤 William A. Whittenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:54
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/281; F01N3/2814; B; B01; B01J; B01J35/00; B01J35/50; B01J35/56; F01N2330/00; F01N2330/02; F01N2330/30; F01N2330/32; F01N2330/322; F01N2330/323; F01N2330/324; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/1241; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
74 words
A substantially nonnesting straight corrugated thin metal foil having parallel longitudinally extending marginal edges and wherein the corrugations are parallel to each other and are arrayed in a plurality of sequential repeating units, each of said repeating units including a plurality of patterns; the length of a repeating unit being no greater than the length of the smallest chord to be made, and the length of each pattern being constant within a repeating unit.
Claim 2
Dependent Claim
74 words
A substantially nonnesting straight corrugated thin metal foil having parallel longitudinally extending marginal edges and wherein the corrugations are parallel to each other and are arrayed in a plurality of sequential repeating units, each of said repeating units including a plurality of patterns; the length of a repeating unit being no greater than the length of the smallest chord to be made, and the length of each pattern being constant within a repeating unit.
Claim 3
Dependent Claim
22 words
A nonnesting straight corrugated foil in accordance with claim 1 wherein the corrugations are orthogonal to the marginal edges of the foil.
Claim 4
Dependent Claim
26 words
A nonnesting straight corrugated foil in accordance with claim 1 wherein each pattern is composed of a plurality of waves each having a predetermined wave length.
Claim 5
Dependent Claim
29 words
A nonnesting straight corrugated foil in accordance with claim 3 wherein the product of the wave length and the number of waves in said pattern is the pattern length.
Claim 6
Dependent Claim
28 words
A nonnesting straight corrugated foil in accordance with claim 1 wherein the length of a repeating unit is the summation of the number of pattern lengths contained therein.
Claim 7
Dependent Claim
17 words
A nonnesting straight corrugated foil in accordance with claim 3 wherein each wave has a sinusoidal configuration.
Claim 8
Dependent Claim
17 words
A nonnesting straight corrugated foil in accordance with claim 3 wherein eacn wave has a square configuration.
Claim 9
Dependent Claim
17 words
A nonnesting straight corrugated foil in accordance with claim 3 wherein each wave has a trapezoidal configuration.
Claim 10
Dependent Claim
21 words
A nonnesting straight corrugated foil in accordance with claim 1 wherein the number of contacting points between layered chords is maximized.
Claim 11
Dependent Claim
22 words
A nonnesting straight corrugated foil in accordance with claim 8 wherein the standard deviation in the number of contacting points is minimized.
Claim 12
Dependent Claim
17 words
A nonnesting straight corrugated foil in accordance with claim 1 wherein the corrugations have a constant amplitude.
Claim 13
Dependent Claim
23 words
A substantially nonnesting straight corrugated thin metal foil in accordance with claim 1 additionally characterized by a nesting factor of 0.80 to 1.0.
Claim 14
Dependent Claim
25 words
A folded substantially nonnesting straight corrugated thin metal foil in accordance with claim 1 additionally characterized by a nesting factor of from 0.80 to 1.0.
Claim 15
Dependent Claim
19 words
A substantially nonnesting straight corrugated thin metal foil in accordance with claim 1 wherein the metal is stainless steel.
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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) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |