Patent US3572430A successfully refreshed from Google Patents.
US3572430A
Expired / Lapsed
US
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Floating head heat exchanger
Assignee: Boeing North American Inc
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Filing: 1969-04-01
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Granted: 1971-03-23
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Expires: 1989-04-01
Abstract
Abstract A SHELL-AND-TUBE HEAT EXCHANGER WHICH EXPERIENCE DIFFERENTIAL EXPANSION BETWEEN THE SHELL AND TUBES WHERE THE EXCHANGER HAS A FLOATING HEAD THAT COOPERATES WITH A DOUBLE-PIPE MECHANICAL JOINT WHICH COMPENSATES FOR ANY DIFFERENTIAL MOTION BETWEEN THE FLOATING HEAD AND THE STATIONARY SHELL.
Inventors
- 👤 Howard O Charnock Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:12
CPC Classifications
F; F28; F28F; F28F9/00; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/053; Y10S165/054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |