Patent US3095255A successfully refreshed from Google Patents.
US3095255A
Expired / Lapsed
US
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Heat exchange apparatus of the evaporative type
Assignee: Carrier Corp
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Filing: 1960-04-25
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Granted: 1963-06-25
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Expires: 1980-04-25
Abstract
No abstract record available.
Inventors
- 👤 John F D Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:53
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/08; F28F21/081; F28F21/085; F25; F25B; F25B39/00; F25B39/02; F25B41/00; F28D; F28D5/00; F28D5/02; F28F13/00; F28F13/003; F28F21/084; F25B2339/00; F25B2339/02; F25B2339/024; F25B2339/0242; Y; Y10; Y10S; Y10S165/00; Y10S165/907
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
A HEAT EXCHANGE TUBE FOR A HEAT EXCHANGER OF THE TYPE EMPLOYING A WETTED EXTERIOR SURFACE HEAT EXCHANGE TUBE, COMPRISING AN AXIALLY ELONGATED TUBULAR METAL BODY HAVING A RELATIVELY IMPERVIOUS INTERIOR SURFACE AND ANOTHER RELATIVELY POROUS EXTERIOR SURFACE BEING EXPOSED FOR DIRECT CONTACT WITH AN AMBIENT LIQUID, SAID POROUS EXTERIOR SURFACE FORMING AT LEAST A PORTION OF THE EXTERIOR PERIPHERY OF SAID HEAT EXCHANGE TUBE, SAID POROUS EXTERIOR SURFACE COMPRISING A COMPACTED METAL POWDER HAVING A LARGE NUMBER OF SURFACE INTERSTICES IN COMMUNICATION WITH MINUTE INTERNAL PORES OF CAPILLARY SIZE.
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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) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |