Patent US3111982A successfully refreshed from Google Patents.
US3111982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated heat exchange structures
Assignee: Gutehoffnungshutte Sterkrade AG
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Filing: 1959-05-20
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Granted: 1963-11-26
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Expires: 1979-05-20
Abstract
No abstract record available.
Inventors
- 👤 Ulbricht Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:37
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0031; F28D9/0037; F28F; F28F3/00; F28F3/02; F28F3/04; F28F3/042; F28F3/046; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356; Y10S165/387
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A HEAT EXCHANGER COMPRISING AT LEAST TWO PAIRS OF LONGITUDINALLY ELONGATED PLATE ELEMENTS, A FIRST ELEMENT COMPRISING A PAIR OF CORRUGATED PLATES DISPOSED IN TOUCHING CONTACT WITH THEIR CORRUGATIONS DISPOSED OPPOSITE IN MIRROR-LIKE ARRANGEMENT AND INCLUDING SUBSTANTIALLY HORIZONTAL END CORRUGATED SECTIONS AND AN INTERMEDIATE OFFSET SUBSTANTIALLY HORIZONTAL CENTRAL CORRUGATED SECTION, THE RESPECTIVE CORRUGATIONS OF SAID CENTRAL SECTION BEING CONNECTED TO RESPECTIVE CORRUGATIONS OF SAID END SECTIONS BY OBLIQUE SECTIONS, A SECOND PLATE ELEMENT SUBSTANTIALLY SIMILAR TO SAID FIRST PLATE ELEMENT AND DISPOSED IN AN INVERTED POSITION ADJACENT SAID FIRST PLATE ELEMENT WITH THE OUTWARDLY EXTENDING CORRUGATED PORTIONS IN TOUCHING CONTACT AT SAID END SECTIONS BUT OFFSET IN AN OPPOSITE MANNER AT SAID INTERMEDIATE AND CENTRAL SECTIONS TO DEFINE A FLOW
Claim 2
Dependent Claim
120 words
A HEAT EXCHANGER COMPRISING AT LEAST TWO PAIRS OF LONGITUDINALLY ELONGATED PLATE ELEMENTS, A FIRST ELEMENT COMPRISING A PAIR OF CORRUGATED PLATES DISPOSED IN TOUCHING CONTACT WITH THEIR CORRUGATIONS DISPOSED OPPOSITE IN MIRROR-LIKE ARRANGEMENT AND INCLUDING SUBSTANTIALLY HORIZONTAL END CORRUGATED SECTIONS AND AN INTERMEDIATE OFFSET SUBSTANTIALLY HORIZONTAL CENTRAL CORRUGATED SECTION, THE RESPECTIVE CORRUGATIONS OF SAID CENTRAL SECTION BEING CONNECTED TO RESPECTIVE CORRUGATIONS OF SAID END SECTIONS BY OBLIQUE SECTIONS, A SECOND PLATE ELEMENT SUBSTANTIALLY SIMILAR TO SAID FIRST PLATE ELEMENT AND DISPOSED IN AN INVERTED POSITION ADJACENT SAID FIRST PLATE ELEMENT WITH THE OUTWARDLY EXTENDING CORRUGATED PORTIONS IN TOUCHING CONTACT AT SAID END SECTIONS BUT OFFSET IN AN OPPOSITE MANNER AT SAID INTERMEDIATE AND CENTRAL SECTIONS TO DEFINE A FLOW
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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) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |