US3489531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer sintered contact body
Assignee: Siemens AG
•
Filing: 1967-09-19
•
Granted: 1970-01-13
•
Expires: 1987-09-19
Abstract
No abstract record available.
Inventors
- 👤 Horst Schreiner
- 👤 Rudolf Scherbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:06
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/027; H01H1/023; H01H1/0231; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12146; Y10T428/12361; Y10T428/12493; Y10T428/12986
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2706759A
Cited
US3248681A
Cited
US3410722A
Cited
US3373003A
Cited
US3359623A
Cited
US3385677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |