Patent US4306543A successfully refreshed from Google Patents.
US4306543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar collector
Assignee: US Philips Corp
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Filing: 1979-07-18
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Granted: 1981-12-22
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Expires: 1999-07-18
Abstract
Abstract There is provided a solar collector comprising an absorber, a getter, and a heating element arranged within an evacuated transparent envelope, the heating element being positioned separate and apart from the getter. Associated with the envelope is means to heat the heating element to a temperature of 500° to 2000° C. in order to crack any hydrocarbons formed from gaseous contaminants released by the envelope and the absorber during operation.
Inventors
- 👤 Robrecht M. L. Doevenspeck
- 👤 Jan J. B. Fransen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:33
CPC Classifications
F; F24; F24S; F24S10/00; F24S10/40; F24S10/45; F24S10/90; F24S10/95; F24S40/00; F24S40/40; F24S40/46; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
A solar collector which comprises an evacuated transparent envelope; an absorber arranged within said envelope; a duct arranged at least partially within said envelope and containing a heat-transport medium, said absorber being associated with said duct so as to transfer heat derived from incident solar radiation to the heat transport medium in said duct during operation; a getter positioned within the envelope; a heating element arranged within said envelope separate and apart from said getter; and means to heat said heating element to a temperature of 500° to 2000° C. in order to crack any hydrocarbons formed from gaseous contaminants released by said envelope and said absorber during operation.
Claim 2
Dependent Claim
109 words
A solar collector which comprises an evacuated transparent envelope; an absorber arranged within said envelope; a duct arranged at least partially within said envelope and containing a heat-transport medium, said absorber being associated with said duct so as to transfer heat derived from incident solar radiation to the heat transport medium in said duct during operation; a getter positioned within the envelope; a heating element arranged within said envelope separate and apart from said getter; and means to heat said heating element to a temperature of 500° to 2000° C. in order to crack any hydrocarbons formed from gaseous contaminants released by said envelope and said absorber during operation.
Claim 3
Dependent Claim
26 words
A solar collector according to claim 1, in which the heating means comprises an arrangement for focussing and concentrating incident solar radiation onto the heating element.
Claim 4
Dependent Claim
23 words
A solar collector according to claim 1, in which the heating means comprises a source of electric current connected to said heating element.
Claim 5
Dependent Claim
24 words
A solar collector according to claim 3, in which the absorber is formed of metal and is connected in series with the heating element.
Claim 6
Dependent Claim
24 words
A solar collector according to claim 3, in which the electric current source comprises a photovoltaic cell arranged to receive solar radiation during operation.
Claim 7
Dependent Claim
17 words
A solar collector according to claim 5, in which the photovoltaic cell is positioned within the envelope.
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) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |