US2737348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovering selenium
Assignee: Sarkes Tarzian Inc
•
Filing: 1952-12-19
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Granted: 1956-03-06
•
Expires: 1972-12-19
Abstract
No abstract record available.
Inventors
- 👤 William B Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:15
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A METHOD OF RECOVERING MATERIALS FROM RECTIFIER CELLS INCLUDING METALLIC BASE PLATES CARRYING AN INTIMATELY JOINED LAYER OF SELENIUM WHICH IN TURN CARRIES AN INTIMATELY JOINED LAYER OF COUNTER-ELECTRODE METAL, WHICH METHOD COMPRISES SUBJECTING SAID CELLS TO TRITURATING FORCES TO PRODUCE A MIXTURE CONSISTING ESSENTIALLY OF PULVERIZED SELENIUM, PULVERIZED COUNTER-ELECTRODE METAL AND SAID BASE PLATES, REMOVING THE PLATES FROM THE MIXTURE, AND SEPARATING SAID PULVERIZED SELENIUM FROM SAID PULVERIZED COUNTER-ELECTRODE METAL.
Claim 2
Independent Claim
71 words
A METHOD OF RECOVERING MATERIALS FROM RECTIFIER CELLS INCLUDING METALLIC BASE PLATES CARRYING AN INTIMATELY JOINED LAYER OF SELENIUM WHICH IN TURN CARRIES AN INTIMATELY JOINED LAYER OF COUNTER-ELECTRODE METAL, WHICH METHOD COMPRISES SUBJECTING SAID CELLS TO TRITURATING FORCES TO PRODUCE A MIXTURE CONSISTING ESSENTIALLY OF PULVERIZED SELENIUM, PULVERIZED COUNTER-ELECTRODE METAL AND SAID BASE PLATES, REMOVING THE PLATES FROM THE MIXTURE, AND SEPARATING SAID PULVERIZED SELENIUM FROM SAID PULVERIZED COUNTER-ELECTRODE METAL.
References Cited (Backward Citations)
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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) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |