US3802062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
PROCESS OF PRODUCING SOLDERABLE COMPOSITES CONTAINING AgCdO
Assignee: Doduco Solutions GmbH
•
Filing: 1973-01-23
•
Granted: 1974-04-09
•
Expires: 1993-01-23
Abstract
Abstract An assembly is provided which comprises an AgCd layer, a solderable layer consisting essentially of Ag, and an Ag-Cu alloy layer disposed between and adjoining said AgCd layer and said solderable layer. The assembly is subjected to welding under heat and pressure to cause said Ag-Cu allow layer to form a semiplastic (s + Alpha ) phase. The cadmium in the assembly is then oxidized to produce a solderable silver-cadmium oxide composite for use in making contacts.
Inventors
- 👤 U Harmsen
- 👤 W Pottken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:46
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/001; B23K35/007; B23K20/00; B23K20/22; B23K20/233; B23K35/22; B23K35/24; B23K35/30; B23K35/3006
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
18 words
A process as set forth in claim 1, in which said solderable layer consists of a silver alloy.
Claim 2
Dependent Claim
18 words
A process as set forth in claim 1, in which said Ag-Cu alloy layer contains 9-25 percent copper.
Claim 3
Dependent Claim
46 words
A process as set forth in claim 1, in which said cadmium is oxidized by heating said welded assembly at a temperature of 600* C. to about 800* C. in an atmosphere containing oxygen under a pressure of 1-5 kilograms per square centimeter above atmospheric pressure.
Claim 4
Dependent Claim
43 words
A process as set forth in claim 1, in which said cadmium is oxidized by heating said welded assembly at a temperature of about 800* C. in an atmosphere containing oxygen under a pressure of 1-5 kilograms per square centimeter above atmospheric pressure.
Claim 5
Dependent Claim
46 words
A process as set forth in claim 1, in which said cadmium is oxidized by heating said wElded assembly at a temperature of 600* C. to about 800* C. in an atmosphere containing oxygen under a pressure of 2 kilograms per square centimeter above atmospheric pressure.
Claim 6
Dependent Claim
42 words
A process as set forth in claim 1, in which said cadmium is oxidized by heating said welded assembly at a temperature of about 700* C. in an oxygen atmosphere under a pressure of 3 kilograms per square centimeter above atmospheric pressure.
References Cited (Backward Citations)
CA647653A
Cited
US1658713A
Cited
US2196302A
Cited
US3078562A
Cited
US3288971A
Cited
US3545067A
Cited
US3571546A
Cited
US3596030A
Cited
US3688067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |