Patent US3652235A successfully refreshed from Google Patents.
US3652235A
Expired / Lapsed
US
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Composite metal articles
Assignee: Huntington Alloys Corp
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Filing: 1967-04-14
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Granted: 1972-03-28
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Expires: 1987-04-14
Abstract
Abstract Production of clad stock, e.g., bar, tubing, pipe, etc., wherein the cladding is prepared by pressing metal powders to desired form, the green form is sintered and coextruded hot with the core or basis material. Highly corrosion resistant cladding metals can be applied to core or basis materials of iron-group metals including common structural materials and high recovery of the cladding material is obtained. Clad tubes having a cladding of 50 percent nickel-50 percent chromium alloy on substrates of steels, nickel alloys, including nickel-chronium alloys, etc., can readily be produced for use in applications requiring resistance to severe corrosive conditions at various temperatures.
Inventors
- 👤 Charles E Manilla
- 👤 Harold H Honaker
- 👤 David O Gothard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:34
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/06; B22F7/08; B21; B21C; B21C23/00; B21C23/22; B21C33/00; B21C33/002; B21C33/004; B22F3/00; B22F3/20; B22F7/02; B22F7/04; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12069; Y10T428/1209; Y10T428/12292; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12854; Y10T428/12861; Y10T428/12944; Y10T428/12951; Y10T428/12972
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
55 words
A wrought composite metal tube having a cladding on a basis metal, said cladding consisting essentially of about 40 percent to about 60 percent chromium and the balance essentially nickel, and said basis metal consisting essentially of about 5 percent to 30 percent chromium, up to about 50 percent iron, and the balance essentially nickel.
Claim 2
Dependent Claim
15 words
A composite metal tube according to claim 1 wherein the basis metal is a steel.
Claim 3
Dependent Claim
185 words
A composite extrusion billet consisting essentially of a metal core and a self-supporting, uniformly porous, sintered metal, preformed hollow shell fitted around said core, wherein the sintered hollow shell is metal selected from the group consisting of nickel; chromium; hot workable alloys consisting essentially of nickel with 0 to 15 percent chromium, 0 to 40 percent copper, 0 to 40 percent molybdenum and 0 to 10 percent aluminum; and hot workable iron group-chromium alloys consisting essentially of about 15 percent to 60 percent chromium, up to about 30 percent cobalt, with the balance essentially up to 85 percent iron, up to 85 percent nickel and mixtures thereof; and wherein the core metal is selected from the group consisting of iron; nickel; cobalt; low and medium alloy steels; and an alloy consisting essentially of about 5 percent to 30 percent chromium, up to about 30 percent cobalt, and the balance essentially up to about 90 percent iron and up to about 85 percent nickel; said billet having an outer protective coating of deformable metal selected from the group consisting of nickel, iron, nickel-base and iron-base alloys.
Claim 4
Dependent Claim
98 words
A composite extrusion billet, consisting essentially of a metal core and a self-supporting, uniformly porous, sintered metal, preformed hollow shell fitted about said core, wherein the composition of the sintered hollow shell consists essentially of about 15 percent to 60 percent chromium and the balance essentially nickel, and wherein the core metal is an alloy consisting essentially of about 5 percent to 30 percent chromium, up to about 50 percent iron and the balance essentially nickel; said billet having an outer protective coating of deformable metal selected from the group consisting of nickel, iron, nickel-base and iron-base alloys.
Claim 5
Dependent Claim
75 words
A composite extrusion billet consisting essentially of a metal core and a self-supporting, uniformly porous, sintered metal, preformed hollow shell fitted about said core, wherein the composition of the sintered hollow shell consists essentially of about 40 percent to 60 percent chromium and the balance essentially nickel, and wherein the core is a steel; said billet having an outer protective coating of deformable metal from the group consisting of nickel, iron nickel-base and iron-base alloys.
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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) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |