US2699522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Titanium dioxide rectifier
Assignee: Individual
•
Filing: 1952-01-04
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Granted: 1955-01-11
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Expires: 1972-01-04
Abstract
No abstract record available.
Inventors
- 👤 Robert G Breckenridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:24
CPC Classifications
H; H10; H10P; H10P95/00; H10P95/80; H10D; H10D62/00; H10D62/80; H10P10/00; Y; Y10; Y10T; Y10T428/00; Y10T428/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A DRY DISK RECTIFIER COMPRISING A BASE ELECTRODE OF TITANIUM, A SEMICONDUCTOR OF TITANIUM DIOXIDE CONTAINING TRIVALENT TITANIUM IONS FORMED DIRECTLY ON SAID TITANIUM, AND A COUNTER-ELECTRODE, SAID SEMICONDUCTOR BEING FORMED BY HEATING THE TITANIUM BASE ELECTRODE IN OXYGEN AT 700 DEGREES C. FOR ONE HOUR AND THEN REDUCING THE OXIDE IN HYDROGEN AT 700 DEGREES C. FOR 5 MINUTES.
Claim 2
Dependent Claim
60 words
A DRY DISK RECTIFIER COMPRISING A BASE ELECTRODE OF TITANIUM, A SEMICONDUCTOR OF TITANIUM DIOXIDE CONTAINING TRIVALENT TITANIUM IONS FORMED DIRECTLY ON SAID TITANIUM, AND A COUNTER-ELECTRODE, SAID SEMICONDUCTOR BEING FORMED BY HEATING THE TITANIUM BASE ELECTRODE IN OXYGEN AT 700 DEGREES C. FOR ONE HOUR AND THEN REDUCING THE OXIDE IN HYDROGEN AT 700 DEGREES C. FOR 5 MINUTES.
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) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |