US4064914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous metallic layer and formation
Assignee: Katalistiks International Inc
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Filing: 1976-11-23
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Granted: 1977-12-27
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Expires: 1996-11-23
Abstract
Abstract A metallic porous layer is formed on copper or copper alloy base material by providing a loose coating of copper or steel powder matrix, bonding metal alloy consisting of copper and phosphorous, or copper and antimony and a liquid binder, partially heating to evolve the liquid binder and further heating to 1350 DEG -1550 DEG F. to braze the bonding metal alloy to the base material and matrix.
Inventors
- 👤 Andrew Campbell Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:12
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/18; F28F13/185; F28F13/187; B; B22; B22F; B22F7/00; B22F7/002; C; C23; C23C; C23C24/00; C23C24/08; C23C24/10; C23C24/103; C23C24/106; Y; Y10; Y10S; Y10S165/00; Y10S165/907
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
As an article of manufacture, a copper base material tube of grain size below approximately 0.05 mm. and a porous layer less than 0.125 inch thick on at least one surface of said tube comprising metal particles wherein said particles are of a material selected from the group consisting of copper, copper alloy and steel of 30-500 mesh size in random stacked relation as a uniform structure with interstitial and inteconnected pores between adjacent particles having equivalent pore radii of below approximately 7.5 mils, said particles being brazed together and to the tube surface by a bonding metal alloy consisting of approximately 56% silver, 22% copper, 17% zinc, and 5% tin by weight, having a melting point below 1500° F.
Claim 2
Dependent Claim
120 words
As an article of manufacture, a copper base material tube of grain size below approximately 0.05 mm. and a porous layer less than 0.125 inch thick on at least one surface of said tube comprising metal particles wherein said particles are of a material selected from the group consisting of copper, copper alloy and steel of 30-500 mesh size in random stacked relation as a uniform structure with interstitial and inteconnected pores between adjacent particles having equivalent pore radii of below approximately 7.5 mils, said particles being brazed together and to the tube surface by a bonding metal alloy consisting of approximately 56% silver, 22% copper, 17% zinc, and 5% tin by weight, having a melting point below 1500° F.
Claim 3
Dependent Claim
129 words
As an article of manufacture, a copper base material tube of grain size below approximately 0.05 mm. and a porous layer less than 0.125 inch thick on at least one surface of said tube comprising metal particles wherein said particles are of a material selected from the group consisting of copper, copper alloy and steel of 30-500 mesh size in random stacked relation as a uniform structure with interstitial and interconnected pores between adjacent particles having equivalent pore radii of below approximately 7.5 mils, said particles being brazed together and to the tube surface by a bonding metal alloy consisting of 25-95 weight % antimony, 5-75 weight % copper, comprising 10-30 weight % of the metal particle - metal alloy total and having a melting point below 1500° F.
Claim 4
Dependent Claim
129 words
As an article of manufacture, a copper base material tube of grain size below approximately 0.05 mm. and a porous layer less than 0.125 inch thick on at least one surface of said tube comprising metal particles wherein said particles are of a material selected from the group consisting of copper, copper alloy and steel of 30-500 mesh size in random stacked relation as a uniform structure with interstitial and interconnected pores between adjacent particles having equivalent pore radii of below approximately 7.5 mils, said particles being brazed together and to the tube surface by a bonding metal alloy consisting of 25-95 weight % antimony, 5-75 weight % copper, comprising 10-30 weight % of the metal particle - metal alloy total and having a melting point below 1500° F.
References Cited (Backward Citations)
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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) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |