Patent US2235070A successfully refreshed from Google Patents.
US3078397A
Expired / Lapsed
US
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Transistor
Assignee: US Philips Corp
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Filing: 1955-02-21
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Granted: 1963-02-19
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Expires: 1975-02-21
Abstract
No abstract record available.
Inventors
- 👤 Tummers Leonard Johan
- 👤 Haayman Pieter Willem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:22
CPC Classifications
H; H10; H10D; H10D10/00; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; C; C22; C22C; C22C11/00; C22C13/00; C22C28/00; H10D62/00; H10D62/10; H10D62/60; H10D64/00; H10D64/01; H10D64/011; H10D99/00; H10F; H10F30/00; H10P; H10P95/00; H10P95/50; Y; Y10; Y10S; Y10S420/00; Y10S420/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A SEMICONDUCTIVE DEVICE COMPRISING A BODY OF SUBSTANTIALLY SINGLE CRYSTAL GERMANIUM OF N-TYPE CONDUCTIVITY, AN ELECTRODE DIRECTLY FUSED TO AND ALLOYED WITH SAID N-
Claim 2
Dependent Claim
24 words
A SEMICONDUCTIVE DEVICE COMPRISING A BODY OF SUBSTANTIALLY SINGLE CRYSTAL GERMANIUM OF N-TYPE CONDUCTIVITY, AN ELECTRODE DIRECTLY FUSED TO AND ALLOYED WITH SAID N-
References Cited (Backward Citations)
US2589658A
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US2569347A
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US2697269A
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US2836522A
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US2689930A
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US2719253A
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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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |