Patent US3380812A successfully refreshed from Google Patents.
US3380812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered palladium materials for electric contact
Assignee: Hitachi Ltd
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Filing: 1966-08-04
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Granted: 1968-04-30
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Expires: 1986-08-04
Abstract
No abstract record available.
Inventors
- 👤 Kamoshita Genichi
- 👤 Hirano Mikio
- 👤 Shiba Junko
- 👤 Hara Nobuhiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:08
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; H01H1/0237; C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0021; C22C5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |