US2742438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing crystals
Assignee: RCA Corp
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Filing: 1953-03-31
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Granted: 1956-04-17
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Expires: 1973-03-31
Abstract
No abstract record available.
Inventors
- 👤 Soren M Thomsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:35
CPC Classifications
H; H10; H10P; H10P32/00; C; C01; C01G; C01G11/00; H01; H01J; H01J9/00; H01J9/20; H01J9/233
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
THE PROCESS OF REDUCING THE ELECTRICAL CONDUCTIVITY OF CRYSTALS OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CADMIUM SULPHIDE AND CADMIUM SELENIDE WHICH COMPRISES IMMERSING SAID CRYSTALS IN AN AQUEOUS SOLUTION CONTAINING CATIONS SELECTED FROM THE GROUP CONSISTING OF COPPER AND SILVER, AND HEATING SAID CRYSTALS TO TEMPERATURE SUFFICIENT TO DIFFUSE SAID CATIONS INTO SAID CRYSTAL.
Claim 2
Dependent Claim
57 words
THE PROCESS OF REDUCING THE ELECTRICAL CONDUCTIVITY OF CRYSTALS OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CADMIUM SULPHIDE AND CADMIUM SELENIDE WHICH COMPRISES IMMERSING SAID CRYSTALS IN AN AQUEOUS SOLUTION CONTAINING CATIONS SELECTED FROM THE GROUP CONSISTING OF COPPER AND SILVER, AND HEATING SAID CRYSTALS TO TEMPERATURE SUFFICIENT TO DIFFUSE SAID CATIONS INTO SAID CRYSTAL.
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) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |