US4029853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
PbS-Al selective solar absorber
Assignee: United States Department of the Navy
•
Filing: 1975-06-20
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Granted: 1977-06-14
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Expires: 1995-06-20
Abstract
Abstract A solar absorber comprising a 1000 to 1500 A thick layer of lead sulfide on a thermally conductive base. The solar absorber reflects on the order of 97% of the infrared while absorbing between 90 and 95% of the solar radiation band.
Inventors
- 👤 Thomas J. McMahon
- 👤 Arold K. Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:48
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/0623; 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; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
51 words
As an article of manufacture a solar energy collection panel for solar absorbing purposes comprising: A. a thermally conductive plate of aluminum; and B. a vacuum deposited coating of lead sulfide on one exterior surface of said thermally conductive plate, said lead sulfide coating being from 1000 to 1500 A thick.
Claim 2
Dependent Claim
51 words
As an article of manufacture a solar energy collection panel for solar absorbing purposes comprising: A. a thermally conductive plate of aluminum; and B. a vacuum deposited coating of lead sulfide on one exterior surface of said thermally conductive plate, said lead sulfide coating being from 1000 to 1500 A thick.
Claim 3
Dependent Claim
50 words
An article of manufacture according to claim 1 wherein said thermally conductive plate consists essentially of any suitable thermally conductive plate having a layer of vacuum deposited aluminum at least 500 A thick on one surface and wherein said lead sulfide coating is on the layer of vacuum deposited aluminum.
References Cited (Backward Citations)
US3176678A
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US3272986A
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US3176679A
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US3374830A
Cited
US3716424A
Cited
US3920413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |