US3560170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rod-shaped multilayer semifinished material and a process and an apparatus for manufacturing such material
Assignee: Doduco Solutions GmbH
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Filing: 1968-07-17
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Granted: 1971-02-02
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Expires: 1988-07-17
Abstract
Abstract AN ITEM FORMED BY EXTRUSION FROM A PLURALITY OF SINTERBONDED LAYERS IS USED AS AN ELECTRICAL CONTACT PIECE SUBJECT TO MECHANICAL WEAR. THE PARTICULAR STRUCTURE OF THE PEICE INCLUDING AN AS-EXTRUDED FIBROUS STRUCTURE AND A PLURALITY OF SINTER-BONDED LAYERS, ONE OF WHICH IS FORMED FROM A SOLDERABLE MATERIAL, AND THE OTHER OF WHICH COMPRISES A METAL AND ANOTHER COMPONENT FORMED BY THE THERMAL DECOMPOSITION OF A MATERIAL WHICH EVOLVES GAS WHEN SUBJECT TO HEAT IS ALSO CLAIMED.
Inventors
- 👤 Eugen Durrwachter
- 👤 Carl-Ludwig Meyer
- 👤 Ulf Harmsen
- 👤 Wolfgang Pottken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:56
CPC Classifications
C; C22; C22C; C22C32/00; B; B21; B21C; B21C23/00; B21C23/01; B21C23/22; B21C25/00; B21C25/06; B21C33/00; B21C33/004; B22; B22F; B22F3/00; B22F7/00; B22F7/02; B22F7/06; H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; H01H1/0231; H01H11/00; H01H11/04; H01H11/048; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10T; Y10T29/00; Y10T29/49; Y10T29/49588; Y10T29/49597; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12146; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12625; Y10T428/12771; Y10T428/12778; Y10T428/12986
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |