Patent US3173801A successfully refreshed from Google Patents.
US3173801A
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Electromagnetic radiation energy arrangement
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1961-05-26
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Granted: 1965-03-16
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Expires: 1981-05-26
Abstract
No abstract record available.
Inventors
- 👤 Robert P Lipkis
- 👤 John E Vehrencamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:01
CPC Classifications
F; F24; F24S; F24S70/00; F24S70/20; F24S70/25; F24S70/225; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y10; Y10S; Y10S126/00; Y10S126/907; Y10S126/908; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12639; Y10T428/12736; Y10T428/12743; Y10T428/12764; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/31504; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
A METHOD OF MAKING A SOLAR ENERGY ABSORBING SURFACE COMPRISING THE STEPS OF: VACUUM DEPOSITING A LAYER OF ALUMINUM TO A THICKNESS OF APPROXIMATELY 200 TO 400 ANGTROMS UPON A SUITABLE SUBSTRATE; AND VACUUM DEPOSITING LAYER OF TITANIUM ON SAID LAYER OF ALUMINUM TO A THICKNESS BETWEEN 800 AND 1000 ANGSTROMS AT A DEPOSITION RATE OF APPROXIMATELY 80 ANGSTROMS PER SECOND AND UNDER AN AIR VACUUM OF APPROXIMATELY 10-**4 MILLIMETERS OF MERCURY ABSOLUTE.
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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |