US2718688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing dry rectifiers
Assignee: Siemens Schuckertwerke AG
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Filing: 1950-07-24
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Granted: 1955-09-27
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Expires: 1970-07-24
Abstract
No abstract record available.
Inventors
- 👤 Waldkotter Erich Gerhar Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:39
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; H10D48/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE METHOD OF MANUFACTURING A SELENIUM RECTIFIER COMPOSED OF A BASE ELECTRODE, A XOUNTER ELECTRODE AND AN INTERMEDIATE SELENIUM LAYER, WHICH COMPRISES THE STEPS OF DEPOSITING THE SELENIUM LAYER ONTO THE BASE ELECTRODE, SEPARATELY PRODUCING A COUNTER ELECTRODE AND APPLYING THERETO A GIVEN DOSE OF THALLIUM OF A CONCENTRATION INCREASINGLY GRADUATED TOWARD ONE SURFACE OF THE COUNTER ELECTRODE, AND THEREAFTER FUSING THE COUNTER ELECTRODE AT SAID SURFACE TOGETHER WITH SAID SELENIUM LAYER.
Claim 2
Independent Claim
72 words
THE METHOD OF MANUFACTURING A SELENIUM RECTIFIER COMPOSED OF A BASE ELECTRODE, A XOUNTER ELECTRODE AND AN INTERMEDIATE SELENIUM LAYER, WHICH COMPRISES THE STEPS OF DEPOSITING THE SELENIUM LAYER ONTO THE BASE ELECTRODE, SEPARATELY PRODUCING A COUNTER ELECTRODE AND APPLYING THERETO A GIVEN DOSE OF THALLIUM OF A CONCENTRATION INCREASINGLY GRADUATED TOWARD ONE SURFACE OF THE COUNTER ELECTRODE, AND THEREAFTER FUSING THE COUNTER ELECTRODE AT SAID SURFACE TOGETHER WITH SAID SELENIUM LAYER.
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) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |