US4511439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar-selective layers and method for producing same
Assignee: Hoechst AG
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Filing: 1982-09-29
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Granted: 1985-04-16
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Expires: 2002-09-29
Abstract
Abstract An improved solar-selective layer and method for producing the same on suitable substrates is discussed. In accordance with this invention, a metal layer is first of all deposited on a suitable substrate of a collector and is then oxidized at elevated temperature and pressure.
Inventors
- 👤 Boy Cornils
- 👤 Jurgen Weber
- 👤 Bela Tihanyi
- 👤 Werner DeWin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:37
CPC Classifications
C; C23; C23C; C23C26/00; C23C8/00; C23C8/06; C23C8/08; C23C8/10; F; F24; F24S; F24S70/00; F24S70/20; F24S70/225; F24S70/25; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y10; Y10S; Y10S126/00; Y10S126/907; Y10S126/908
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A method for producing solar-selective layers on a converter for converting solar radiation into thermal energy by means of a metal oxide layer applied to the surface of said converter which includes the steps of depositing a metal layer on the surface of said converter and then oxidizing said layer at a temperature of between 100° C. and 400° C. and a pressure of between 50 and 250 bars.
Claim 2
Independent Claim
69 words
A method for producing solar-selective layers on a converter for converting solar radiation into thermal energy by means of a metal oxide layer applied to the surface of said converter which includes the steps of depositing a metal layer on the surface of said converter and then oxidizing said layer at a temperature of between 100° C. and 400° C. and a pressure of between 50 and 250 bars.
Claim 3
Dependent Claim
15 words
Method according to claim 1 in which the oxidizing is effected with an oxidizing gas.
Claim 4
Dependent Claim
16 words
Method according to claim 1 in which the oxidizing is effected with an oxidizing gas mixture.
Claim 5
Dependent Claim
14 words
Method according to claim 1 in which the oxidizing is effected with pure oxygen.
Claim 6
Dependent Claim
19 words
Method according to claim 1 in which said metal layer is chosen from the group of nickel or cobalt.
Claim 7
Dependent Claim
13 words
Method according to claim 1 in which said metal layer is electrolytically deposited.
Claim 8
Dependent Claim
50 words
In an apparatus for converting solar energy into heat, in which a converter is provided with a heat-absorbing surface, the improvement comprising a metal layer deposited on said surface, said layer having been oxidized at temperatures between 100° C. and 400° C. and pressure of between 50 and 250 bars.
Claim 9
Dependent Claim
50 words
In an apparatus for converting solar energy into heat, in which a converter is provided with a heat-absorbing surface, the improvement comprising a metal layer deposited on said surface, said layer having been oxidized at temperatures between 100° C. and 400° C. and pressure of between 50 and 250 bars.
Claim 10
Dependent Claim
20 words
An apparatus according to claim 7 in which said metal layer is chosen from the group of nickel or cobalt.
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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) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |