US4376801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective coating for solar collectors
Assignee: Reynolds Metals Co
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Filing: 1982-05-19
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Granted: 1983-03-15
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Expires: 2002-05-19
Abstract
Abstract A selective solar coating for solar collectors is disclosed. The coating is characterized by its high absorptance and low emittance. The coating comprises an organic compound or substance having a high molecular weight and a high carbon content, such as a petroleum, vegetable or animal oil, fat or wax, which is pyrolyzed to produce a carbon black pigmented varnish.
Inventors
- 👤 Daniel J. Schardein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:15
CPC Classifications
F; F24; F24S; F24S70/00; F24S70/20; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y10; Y10S; Y10S126/00; Y10S126/907; Y10S126/908; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/269; Y10T428/30; Y10T428/31504; Y10T428/3154; Y10T428/31678; Y10T428/31714; Y10T428/31844
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
91 words
A solar collector comprising an aluminum or steel solar energy collection surface, said collection surface having a selective solar coating thereon, said coating comprising an organic material having a high carbon content and a high molecular weight and being selected from the group consisting of tung oil, castor oil, corn oil, soybean oil, palm oil, lard, butterfat, beeswax, vinyl polymers and petroleum oils, said coating having been pyrolyzed to produce a carbon black pigmented varnish having an absorptance of at least about 0.9 and an emittance not higher than about 0.4.
Claim 2
Dependent Claim
91 words
A solar collector comprising an aluminum or steel solar energy collection surface, said collection surface having a selective solar coating thereon, said coating comprising an organic material having a high carbon content and a high molecular weight and being selected from the group consisting of tung oil, castor oil, corn oil, soybean oil, palm oil, lard, butterfat, beeswax, vinyl polymers and petroleum oils, said coating having been pyrolyzed to produce a carbon black pigmented varnish having an absorptance of at least about 0.9 and an emittance not higher than about 0.4.
Claim 3
Dependent Claim
15 words
The collector of claim 1 wherein said coating comprises a mixture of said organic materials.
Claim 4
Dependent Claim
15 words
The collector of either claim 1 or 2 wherein said coating further comprises a solvent.
Claim 5
Dependent Claim
20 words
The collector of claim 3 wherein said solvent is selected from the group consisting of toluene, kerosene and mineral spirits.
Claim 6
Dependent Claim
21 words
The collector of claim 4 wherein said coating further comprises up to about 10% by weight of a silicone or fluorocarbon.
Claim 7
Dependent Claim
15 words
The collector of claim 4 wherein said coating has a thickness less than 2 micrometers.
References Cited (Backward Citations)
US2016139A
Cited
US2384493A
Cited
GB729604A
Cited
US3208447A
Cited
US3720499A
Cited
US4036206A
Cited
US4222373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |