Patent US4667271A successfully refreshed from Google Patents.
Patent US2552279A successfully refreshed from Google Patents.
US2552279A
Expired / Lapsed
US
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Multilayer catalyst gauze structure
Assignee: Wyeth Holdings LLC
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Filing: 1947-04-24
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Granted: 1951-05-08
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Expires: 1967-04-24
Abstract
No abstract record available.
Inventors
- 👤 Alfred G Houpt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:18
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12347; Y10T428/12444
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A FABRICATED CATALYST STRUCTURE COMPRISING A CONICALLY-SHAPED, MULTI-LAYERED WIRE GAUZE, THE CIRCULAR EDGE AT ITS BASAL CIRCUMFERENCE BEING INTEGRALLY ATTACHED TO THE EDGE OF A SINGLE-LAYERED, SHEET-METAL MOUNTING SECTION, THE GAUZE COMPRISING THE MULTI-LAYERED SECTION BEING A CIRCULAR SINGLE SHEET HAVING 40-80 OPENINGS PER LINEAR FOOT AND HAVING TWO FREE RADIAL EDGES ONLY, ONE SUCH EDGE LYING ALONG THE INNER SURFACE OF THE CONE AND EXTENDING FROM THE BASE TO THE POINT, THE OTHER BEING SUBSTANTIALLY ALIGNED THEREWITH BUT LYING ALONG THE OUTER SURFACE OF THE CONE, THE LAYERS IN THE CONICAL SECTION BEING IN UNIFORM DIRECT CONTACT, THE WIRES COMPRISING THE GAUZE IN ANY ONE LAYER BEING INTEGRALLY UNITED TO THE WIRES IN ANY ADJACENT LAYER IN CONTACT THEREWITH AND THE OPENINGS IN ANY ONE LAYER BEING UNIFORMLY POSITIONED WITH REGARD TO THE OPENINGS IN ALL LAYERS IN CONTACT THEREWITH.
Claim 2
Dependent Claim
141 words
A FABRICATED CATALYST STRUCTURE COMPRISING A CONICALLY-SHAPED, MULTI-LAYERED WIRE GAUZE, THE CIRCULAR EDGE AT ITS BASAL CIRCUMFERENCE BEING INTEGRALLY ATTACHED TO THE EDGE OF A SINGLE-LAYERED, SHEET-METAL MOUNTING SECTION, THE GAUZE COMPRISING THE MULTI-LAYERED SECTION BEING A CIRCULAR SINGLE SHEET HAVING 40-80 OPENINGS PER LINEAR FOOT AND HAVING TWO FREE RADIAL EDGES ONLY, ONE SUCH EDGE LYING ALONG THE INNER SURFACE OF THE CONE AND EXTENDING FROM THE BASE TO THE POINT, THE OTHER BEING SUBSTANTIALLY ALIGNED THEREWITH BUT LYING ALONG THE OUTER SURFACE OF THE CONE, THE LAYERS IN THE CONICAL SECTION BEING IN UNIFORM DIRECT CONTACT, THE WIRES COMPRISING THE GAUZE IN ANY ONE LAYER BEING INTEGRALLY UNITED TO THE WIRES IN ANY ADJACENT LAYER IN CONTACT THEREWITH AND THE OPENINGS IN ANY ONE LAYER BEING UNIFORMLY POSITIONED WITH REGARD TO THE OPENINGS IN ALL LAYERS IN CONTACT THEREWITH.
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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) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |