US2498714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selenium rectifier
Assignee: International Standard Electric Corp
•
Filing: 1946-08-02
•
Granted: 1950-02-28
•
Expires: 1966-08-02
Abstract
No abstract record available.
Inventors
- 👤 Searle Arthur Mackenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:17
CPC Classifications
D; D03; D03C; D03C1/00; D03C1/14; C; C07; C07H; C07H15/00; C07H15/02; C07H15/14; C07H15/16; H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; H10D48/042; H10D99/00; D03C2700/00; D03C2700/01; D03C2700/0127; D03C2700/0177
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A SELENIUM RECTIFIER ELEMENT THAT COMPRISES A PERFORATE CERAMIC SUPPORTING MEMBER, SELENIUM COATING SAID MEMBER AND FILLING THE PERFORATIONS THEREOF, A METALLIC BATH ELECTRODE OVERLYING AND MAKING CONTACT WITH A FIRST PART OF THE SELENIUM COATING AND A COUNTER-ELECTRODE OVERLYING AND MAKING ELECTRICAL CONTACT WITH ANOTHER AND SECON PART OF SAID SELENIUM COATING.
Claim 2
Dependent Claim
53 words
A SELENIUM RECTIFIER ELEMENT THAT COMPRISES A PERFORATE CERAMIC SUPPORTING MEMBER, SELENIUM COATING SAID MEMBER AND FILLING THE PERFORATIONS THEREOF, A METALLIC BATH ELECTRODE OVERLYING AND MAKING CONTACT WITH A FIRST PART OF THE SELENIUM COATING AND A COUNTER-ELECTRODE OVERLYING AND MAKING ELECTRICAL CONTACT WITH ANOTHER AND SECON PART OF SAID SELENIUM COATING.
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) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |