Patent US4323115A successfully refreshed from Google Patents.
US4323115A
Expired / Lapsed
US
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Shell and tube heat exchanger with polymeric tube sheets
Assignee: Chicago Bridge and Iron Co
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Filing: 1980-09-26
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Granted: 1982-04-06
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Expires: 2000-09-26
Abstract
Abstract A heat exchanger having a plurality of spaced apart tubes, a shell around the tubes; a pair of spaced apart molded in place tube sheets of solid polymeric material bonded to the tubes and to the shell interior surface and providing the primary support for the tubes, a conduit to deliver a heat exchange fluid around the tubes inside of the shell between the tube sheets; and a conduit to deliver a liquid feed stream into a feed box partially defined by one of the tube sheets.
Inventors
- 👤 Donald C. Stafford
- 👤 Vincent F. Allo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:43
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/04; F28F9/16; F28F9/162; F28F21/00; F28F21/06; F28F21/067; Y; Y10; Y10S; Y10S165/00; Y10S165/905
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
108 words
A heat exchanger comprising: a plurality of spaced apart tubes; a shell around the tubes; a pair of spaced apart molded in place tube sheets of solid polymeric material bonded to the tubes and to the shell interior surface and providing the primary support for the tubes; at least one tube sheet having a high tensile strength layer of polymeric material and a high compressive strength layer of polymeric material; means to deliver a heat exchange fluid around the tubes inside of the shell between the tube sheets; and means to deliver a liquid feed stream into a feed box partially defined by one of the tube sheets.
Claim 2
Dependent Claim
108 words
A heat exchanger comprising: a plurality of spaced apart tubes; a shell around the tubes; a pair of spaced apart molded in place tube sheets of solid polymeric material bonded to the tubes and to the shell interior surface and providing the primary support for the tubes; at least one tube sheet having a high tensile strength layer of polymeric material and a high compressive strength layer of polymeric material; means to deliver a heat exchange fluid around the tubes inside of the shell between the tube sheets; and means to deliver a liquid feed stream into a feed box partially defined by one of the tube sheets.
Claim 3
Dependent Claim
30 words
A heat exchanger according to claim 1 in which both tube sheets comprise a high tensile strength layer of polymeric material and a high compressive strength layer of polymeric material.
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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) | 1985-04-05 | 1985-10-05 | 1986-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-05 | 1989-10-05 | 1990-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-05 | 1993-10-05 | 1994-04-06 | $7700.00 | Window Closed / Lapsed |