US4171993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated metal nodule solar heat collector
Assignee: Borg Warner Corp
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Filing: 1978-03-06
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Granted: 1979-10-23
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Expires: 1998-03-06
Abstract
Abstract A solar heat collector comprising a metallic substrate having nodular or dendritic surfaces coated with a black absorber coating, and the method of preparing same.
Inventors
- 👤 Clarence E. Albertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:27
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/10; C25D5/34; C25D5/60; C25D5/605; C25D5/611; C25D5/627; Y; Y10; Y10S; Y10S126/00; Y10S126/907; Y10S126/908; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12639; Y10T428/12646; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/1291
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
A solar heat collector comprising a metallic substrate, a plurality of dendrite surfaces on said substrate, a metal coating on said dendrite surfaces, and a black solar absorbing coating covering said metal coating of said dendrite surfaces selected from the group consisting of black nickel and black chrome.
Claim 2
Dependent Claim
48 words
A solar heat collector comprising a metallic substrate, a plurality of dendrite surfaces on said substrate, a metal coating on said dendrite surfaces, and a black solar absorbing coating covering said metal coating of said dendrite surfaces selected from the group consisting of black nickel and black chrome.
Claim 3
Dependent Claim
15 words
A solar heat collector in accordance with claim 1 wherein said metallic substrate is copper.
Claim 4
Dependent Claim
27 words
A solar heat collector in accordance with claim 1 wherein said metallic substrate is copper and said dendrite surfaces are copper and said metal coating is copper.
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) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |