US3776701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst supporting structure
Assignee: Johnson Matthey Inc
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Filing: 1971-10-05
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Granted: 1973-12-04
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Expires: 1991-10-05
Abstract
Abstract A catalyst supporting structure comprising a layer of heatresistant rope elements composed of compacted knitted wire, placed in contiguous relationship with each other to provide a pad of substantially uniform thickness and having flat top and bottom surfaces and a woven sheet of heat-resistant material bonded to each surface.
Inventors
- 👤 J Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:22
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/862; B01J12/00; B01J12/007; B01J35/00; B01J35/50; B01J35/58; D; D04; D04B; D04B1/00; D04B1/22; D04B1/225; D10; D10B; D10B2101/00; D10B2101/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
18 words
A catalyst supporting structure according to claim 1 wherein the sheets and the rope elements comprise nichrome wire.
Claim 2
Dependent Claim
19 words
A catalyst supporting structure according to claim 1 wherein the rope elements include a getter material for volatilized catalyst.
Claim 3
Dependent Claim
12 words
A structure according to claim 1 wherein said wire comprises stainless steel.
Claim 4
Dependent Claim
17 words
A catalyst supporting structure according to claim 1 wherein the rope elements are essentially square in cross-section.
Claim 5
Dependent Claim
69 words
A catalyst supporting structure according to claim 5 and comprising rope elements arranged in parallel in a common plane and of varying lengths so as to form a pad, another such element or elements peripherally encompassing said pad to enclose the elements arranged in parallel, and woven sheets of heat-resistant material on the top and bottom of said pad, said sheets being bonded to the pad at spaced intervals.
Claim 6
Dependent Claim
69 words
A method of making a structure according to claim 1 which comprises flattening a knitted wire tube, rolling the same into a cylinder and shaping the same to form a porous rope having flat sides, forming said rope into a flat-surfaced pad of essentially uniform thickness with adjacent elements of said rope in contiguous relationship and then bonding woven sheets of heat-resistant material to both surfaces of said pad.
Claim 7
Dependent Claim
68 words
The method of claim 7, wherein the pad is formed by cutting Said rope into rope elements of desired length, placing said elements together in contiguous, relationship in a common plane to form said pad, peripherally encompassing said pad with at least one more of said rope elements, positioning the woven sheets on the surfaces of the pad and bonding the sheets at spaced intervals to said pad.
Claim 8
Dependent Claim
29 words
The method of claim 9 wherein the pad is formed by winding a continuous length of the rope upon itself to form a flat spiral pad of said rope.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |