US4291758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of boiling heat transfer surface
Assignee: Mitsubishi Electric Corp
•
Filing: 1979-10-03
•
Granted: 1981-09-29
•
Expires: 1999-10-03
Abstract
Abstract A boiling heat transfer surface for heat transfer between a heat source and a coolant is provided. On the heat transfer surface contacting with a liquid coolant such as fluorinated hydrocarbon type liquid coolants, metallic particles having grain size of 60 mesh pass and 250 mesh nonpass (Japanese Industrial Standard sieve) are piled up and fixed by a metallic film on the heat transfer surface.
Inventors
- 👤 Masao Fujii
- 👤 Yoshifusa Ogawa
- 👤 Yoshiyuki Morihiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:23
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/18; F28F13/185; F28F13/187; Y; Y10; Y10S; Y10S165/00; Y10S165/907
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
A boiling heat transfer surface for contacting with a liquid coolant, comprising a porous layer on a substrate, said porous layer formed of: a layer of metallic particles having grain sizes of between 60 mesh pass and 250 mesh non-pass, said layer being at least one particle thick and defining interstices between said particles; and a metallic film plated on said particles and fixing said particles to one another and to said substrate, said metallic film having a substantially uniform thickness on each said particle greater than 10μ but not sufficiently great to fill said interstices, whereby said interstices form at least some of the pores of said porous layer.
Claim 2
Dependent Claim
110 words
A boiling heat transfer surface for contacting with a liquid coolant, comprising a porous layer on a substrate, said porous layer formed of: a layer of metallic particles having grain sizes of between 60 mesh pass and 250 mesh non-pass, said layer being at least one particle thick and defining interstices between said particles; and a metallic film plated on said particles and fixing said particles to one another and to said substrate, said metallic film having a substantially uniform thickness on each said particle greater than 10μ but not sufficiently great to fill said interstices, whereby said interstices form at least some of the pores of said porous layer.
Claim 3
Dependent Claim
17 words
A boiling heat transfer surface according to claim 1 wherein the metallic film is made of nickel.
Claim 4
Dependent Claim
25 words
The surface of claim 1, wherein said plated metallic film is coated by dipping said layer of said metallic particles in a metallic plating solution.
References Cited (Backward Citations)
US3384154A
Cited
US3161478A
Cited
JPS4947349A
Cited
JPS4947350A
Cited
US4120994A
Cited
US4064914A
Cited
JPS5118357A
Cited
US3990862A
Cited
US4182412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |