Patent US4048980A successfully refreshed from Google Patents.
US4048980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar radiation absorbing material
Assignee: Energy Research and Development Administration ERDA
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Filing: 1976-03-08
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Granted: 1977-09-20
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Expires: 1996-03-08
Abstract
Abstract Solar energy absorbing means in solar collectors are provided by a solar selective carbon surface. A solar selective carbon surface is a microporous carbon surface having pores within the range of 0.2 to 2 micrometers. Such a surface is provided in a microporous carbon article by controlling the pore size. A thermally conductive substrate is provided with a solar selective surface by adhering an array of carbon particles in a suitable binder to the substrate, a majority of said particles having diameters within the range of about 0.2-10 microns.
Inventors
- 👤 John M. Googin
- 👤 Charles R. Schmitt
- 👤 James M. Schreyer
- 👤 Harlan D. Whitehead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:26
CPC Classifications
F; F24; F24S; F24S70/00; F24S70/20; F24S70/225; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y10; Y10S; Y10S126/00; Y10S126/907
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
60 words
In a solar collector comprising in combination means for absorbing solar energy from incident solar radiation and means for conducting said energy to a heat transfer medium, the improvement wherein said means for absorbing solar energy is provided with a solar selective surface comprising carbon, said surface having a majority of external pores within the range of about 0.2-2 micrometers.
Claim 2
Dependent Claim
60 words
In a solar collector comprising in combination means for absorbing solar energy from incident solar radiation and means for conducting said energy to a heat transfer medium, the improvement wherein said means for absorbing solar energy is provided with a solar selective surface comprising carbon, said surface having a majority of external pores within the range of about 0.2-2 micrometers.
Claim 3
Dependent Claim
46 words
The solar collector of claim 1 wherein said means for absorbing solar energy comprises a thermally conductive substrate and said solar selective surface comprises a solar selective array of carbon particles in a binder for adhering said carbon particles together and to said thermally conductive substrate.
Claim 4
Dependent Claim
22 words
The solar collector of claim 2 wherein a majority of said carbon particles have diameters within the range of about 0.2-10 micrometers.
Claim 5
Dependent Claim
17 words
The solar collector of claim 2 wherein said carbon particles have been fired to above 1900° C.
Claim 6
Independent Claim
41 words
A method of providing a thermally conductive substrate with a selective solar energy absorbing coating, said method comprising adhering a coating comprising carbon particles to said surface, a majority of said carbon particles having diameters within the range of 0.2-10 micrometers.
Claim 7
Independent Claim
41 words
A method of providing a thermally conductive substrate with a selective solar energy absorbing coating, said method comprising adhering a coating comprising carbon particles to said surface, a majority of said carbon particles having diameters within the range of 0.2-10 micrometers.
Claim 8
Dependent Claim
15 words
The method of claim 5 wherein said carbon particles are fired to above 1900° C.
Claim 9
Dependent Claim
23 words
The solar collector of claim 2 wherein said carbon particles have a majority of external pores within the range of about 0.2-2 micrometers.
Claim 10
Dependent Claim
17 words
The solar collector of claim 7 wherein said carbon particles have been fired to above 1900° C.
Claim 11
Independent Claim
43 words
A method of providing a thermally conductive substrate with a selective solar energy absorbing coating, said method comprising adhering a coating comprising carbon particles to said surface, said carbon particles having a majority of external pores within the range of about 0.2-2 micrometers.
Claim 12
Independent Claim
43 words
A method of providing a thermally conductive substrate with a selective solar energy absorbing coating, said method comprising adhering a coating comprising carbon particles to said surface, said carbon particles having a majority of external pores within the range of about 0.2-2 micrometers.
Claim 13
Dependent Claim
15 words
The method of claim 9 wherein said carbon particles are fired to above 1900° C.
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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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |