US3884779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the controlled formation of the layer of copper sulphide of a cadmium sulphide photocell
Assignee: Societe Anonyme de Telecommunications SAT
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Filing: 1973-05-24
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Granted: 1975-05-20
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Expires: 1993-05-24
Abstract
Abstract A method for the controlled formation of the layer of copper sulphide of a cadmium sulphide photocell by immersion in a solution of cuprous ions, wherein the photocell being produced is maintained throughout the duration of its immersion in said solution at a constant potential at least equal to that of a pure copper electrode immersed in the same solution.
Inventors
- 👤 Thuoc Nguyen Duy
- 👤 Wolfgang Palz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:24
CPC Classifications
H; H10; H10F; H10F10/00; H10F10/10; H10F10/16; H10F10/169; C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/38; H10P; H10P14/00; H10P14/20; H10P14/26; H10P14/265; H10P14/29; H10P14/2901; H10P14/2913; H10P14/2915; H10P14/34; H10P14/3402; H10P14/3436; H10P95/00; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02E10/543
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
48 words
A METHOD FOR THE CONTROLLED FORMATION OF THE LAYER OF CU2S OF A CDS-CU2S PHOTOCELL THROUGH ION EXCHANGE BY IMMERSION IN A SOLUTION OF CUPROUS IONS, THE PHOTOCELL BEING PRODUCED BEING MAINTAINED THROUGHOUT THE DURATION OF ITS IMMERSION IN SAID SOLUTION AT A CONSTANT POSITIVE OR ZERO POTEN-
Claim 2
Independent Claim
48 words
A METHOD FOR THE CONTROLLED FORMATION OF THE LAYER OF CU2S OF A CDS-CU2S PHOTOCELL THROUGH ION EXCHANGE BY IMMERSION IN A SOLUTION OF CUPROUS IONS, THE PHOTOCELL BEING PRODUCED BEING MAINTAINED THROUGHOUT THE DURATION OF ITS IMMERSION IN SAID SOLUTION AT A CONSTANT POSITIVE OR ZERO POTEN-
Claim 3
Dependent Claim
42 words
A method as claimed in claim 1, wherein the solution of cuprous ions comprises 25 g of CuI and 500 g of KI dissolved in a litre of water to which is added a small amount of hydrazine monobromide as reducing agent.
Claim 4
Dependent Claim
23 words
A method as claimed in claim 1, wherein the photocell being produced is short-circuited with a piece of copper immersed in said solution.
Claim 5
Dependent Claim
40 words
A method as claimed in claim 1, wherein the photocell being produced is connected to the positive terminal of a direct current power source, the negative terminal of which is connected to a piece of copper immersed in said solution.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |