Patent US4934453A successfully refreshed from Google Patents.
US4934453A
Expired / Lapsed
US
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Heat exchanger module of fired ceramic material
Assignee: Hoechst AG
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Filing: 1989-11-02
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Granted: 1990-06-19
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Expires: 2009-11-02
Abstract
Abstract In a heat exchanger module of fired ceramic material produced from a stack of punched and laminated green ceramic cards, the stack comprises at least two cards. The cards have first cut-outs (1) which, in stacked cards, form tubular channels (12) and second cut-outs (2, 4, 7, 8) which are positioned around the first cut-outs (1) and which, in stacked cards, partially overlap with the second cut-outs (2, 4, 7) of adjacent cards. Channels (13) which lie in the plane of the cards and surround the tubular channels (12) are thus formed.
Inventors
- 👤 Rudolf Ganz
- 👤 Otto Heinz
- 👤 Heinrich Schelter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:37
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/04; F28F3/00; F28F3/08; F28F3/086; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356; Y10S165/36; Y10S165/905
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
A heat exchanger module of fired ceramic material produced from a stack of punched and laminated ceramic cards, the stack comprising at least two cards, each card having a plurality of first cut-outs (1) aligned to form tubular channels (12) when the cards are superimposed one above the other in engagement with one another and a plurality of second cut-outs (2,4,7,8) which are positioned around the first cut-outs (1) and which are arranged to partially overlap and misalign with the second cut-outs (2,4,7) of adjacent cards in the stack to form second channels (13) which lie in the plane of the cards and surround the tubular channels (12); alternate cards in said stack having said first and second cut-outs arranged therein such that each first cut-out is entirely surrounded by second cut-outs, whereby any two adjacent first cut-outs have disposed therebetween at least a portion of one or more second cut-outs.
Claim 2
Dependent Claim
151 words
A heat exchanger module of fired ceramic material produced from a stack of punched and laminated ceramic cards, the stack comprising at least two cards, each card having a plurality of first cut-outs (1) aligned to form tubular channels (12) when the cards are superimposed one above the other in engagement with one another and a plurality of second cut-outs (2,4,7,8) which are positioned around the first cut-outs (1) and which are arranged to partially overlap and misalign with the second cut-outs (2,4,7) of adjacent cards in the stack to form second channels (13) which lie in the plane of the cards and surround the tubular channels (12); alternate cards in said stack having said first and second cut-outs arranged therein such that each first cut-out is entirely surrounded by second cut-outs, whereby any two adjacent first cut-outs have disposed therebetween at least a portion of one or more second cut-outs.
Claim 3
Dependent Claim
17 words
The heat exchanger module as claimed in claim 1, wherein the second cut-outs (4, 7) are slot-shaped.
Claim 4
Dependent Claim
16 words
The heat exchanger module as claimed in claim 1, wherein the second cut-outs (2) are angular.
Claim 5
Dependent Claim
28 words
The heat exchanger module as claimed in claim 3, wherein each said angular second cutout comprises a circular boundary (3) which is concentric with a first cut-out (1).
Claim 6
Dependent Claim
30 words
The heat exchanger module as claimed in claim 1, wherein the second cut-outs (7, 8) of one card (5) are slot-shaped and those of an adjacent card (6) are circular.
Claim 7
Dependent Claim
21 words
The heat exchanger module as claimed in claim 1, wherein the first cut-outs (1) forming the tubular channels (12) are circular.
Claim 8
Dependent Claim
37 words
The heat exchanger module as claimed in claim 1, wherein each first cut-out (1) in at least one of said at least two cards is surrounded by four slots (4, 7) positioned at right-angles to one another.
Claim 9
Dependent Claim
26 words
The heat exchanger module as claimed in claim 7, wherein the slots (4, 7) have lengths of one to three diameters of the first cut-outs (1).
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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) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |