Patent FR1131428A successfully refreshed from Google Patents.
Patent US3626372A successfully refreshed from Google Patents.
US4351887A
Expired / Lapsed
US
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Foldable metallic gauze pack and segment
Assignee: Johnson Matthey PLC
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Filing: 1980-04-22
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Granted: 1982-09-28
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Expires: 2000-04-22
Abstract
Abstract This invention relates to a laminated article, particularly to such an article comprising a gauze pack containing two or more gauzes such as are typically used as catalyst catchment or getter means in nitric acid production plants. Specifically, this invention provides a gauze pack segment suitable for locating in planar contiguous relationship with one or more further gauze pack segments to provide a gauze pack having a predetermined, for example, a regular geometric shape comprises a plurality of superposed gauze segments having at least when assembled substantially identical shape and area and held in fixed relationship one with another.
Inventors
- 👤 David C. Bishop
- 👤 Alan E. Heywood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:43
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0006; B01J19/002; B01J12/00; B01J12/007; C; C01; C01B; C01B21/00; C01B21/20; C01B21/24; C01B21/26; C01B21/267; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12347; Y10T428/12361
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
128 words
A gauze pack segment for use in an assembly of a foldable gauze pack, the said segment being suitable for locating in a plane with similar segments and in edge to edge contiguous relationship with at least one adjacent segment to form a gauze pack having a predetermined geometric shape, the pack segment comprising a plurality of superposed gauze segments having at least when assembled substantially identical shape and area and held in fixed relationship one with another, in which at least two adjacent segments are hingeably connected, alternate gauze segments being woven from a first metallic material with a gauze segment woven from a second metallic material being interleaved between said alternate gauze segments, each said gauze segment having the form of a sector of a circle.
Claim 2
Dependent Claim
128 words
A gauze pack segment for use in an assembly of a foldable gauze pack, the said segment being suitable for locating in a plane with similar segments and in edge to edge contiguous relationship with at least one adjacent segment to form a gauze pack having a predetermined geometric shape, the pack segment comprising a plurality of superposed gauze segments having at least when assembled substantially identical shape and area and held in fixed relationship one with another, in which at least two adjacent segments are hingeably connected, alternate gauze segments being woven from a first metallic material with a gauze segment woven from a second metallic material being interleaved between said alternate gauze segments, each said gauze segment having the form of a sector of a circle.
Claim 3
Dependent Claim
34 words
A gauze pack segment according to claim 1 and suitable for use in an ammonia oxidation reactor in which the first material comprises a support material and the second material comprises a getter material.
Claim 4
Dependent Claim
18 words
A gauze pack segment according to claim 2 in which the support material comprises an oxidation-resistant stainless steel.
Claim 5
Dependent Claim
22 words
A gauze pack segment according to claim 2 in which the getter material comprises an alloy consisting essentially of gold and palladium.
Claim 6
Dependent Claim
15 words
A gauze pack segment according to claim 1 in which the sector is a hemisphere.
Claim 7
Dependent Claim
15 words
A gauze pack segment according to claim 1 in which the sector is a quadrant.
Claim 8
Dependent Claim
20 words
A gauze pack having a regular geometric shape and comprising two or more gauze pack segments according to claim 1.
Claim 9
Dependent Claim
17 words
A gauze pack according to claim 7 in which the segments have substantially identical shape and area.
Claim 10
Dependent Claim
24 words
A gauze pack according to claim 7 in which at least two of the segments have a different shape and area from each other.
Claim 11
Dependent Claim
101 words
A foldable gauze pack having a regular geometric shape and comprising at least two pack segments in which at least two adjacent segments are hingeably connected, comprising a plurality of superposed gauze segments having at least when assembled substantially identical shape and area and held in fixed relationship one with another, alternate gauze segments being woven from a first material with a gauze segment woven from a second material being interleaved between said alternate gauze segments, the said first material comprising an oxidation-resistant stainless steel support material and the second material comprising a getter alloy consisting essentially of gold and palladium.
Claim 12
Dependent Claim
101 words
A foldable gauze pack having a regular geometric shape and comprising at least two pack segments in which at least two adjacent segments are hingeably connected, comprising a plurality of superposed gauze segments having at least when assembled substantially identical shape and area and held in fixed relationship one with another, alternate gauze segments being woven from a first material with a gauze segment woven from a second material being interleaved between said alternate gauze segments, the said first material comprising an oxidation-resistant stainless steel support material and the second material comprising a getter alloy consisting essentially of gold and palladium.
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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) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |