US3205937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of effective emissivity and absorptivity
Assignee: Northrop Grumman Corp
•
Filing: 1962-05-28
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Granted: 1965-09-14
•
Expires: 1982-05-28
Abstract
No abstract record available.
Inventors
- 👤 Shyffer Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:39
CPC Classifications
B; B64; B64G; B64G1/00; B64G1/22; B64G1/46; B64G1/50; F; F28; F28F; F28F7/00; F28F2245/00; F28F2245/06; F28F2255/00; F28F2255/04; Y; Y10; Y10S; Y10S165/00; Y10S165/132; Y10S165/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
HEAT EXCHANGE APPARATUS COMPRISING: A HOUSING HAVING AT LEAST ONE OPENING IN A WALL THEREOF; METALLIC SHEET MEANS INCLUDING A PLURALITY OF SECTIONS; EACH OF SAID SECTIONS INCLUDING A PAIR OF INDIVIDUAL SHEET MEMBERS HAVING HIGH AND LOW COEFFICIENTS OF THERMAL EXPANSION, RESPECTIVELY; SAID INDIVIDUAL SHEET MEMBERS BEING SECURED TOGETHER IN END-TO-END ABUTTING RELATION TO PROVIDE A COMPOSITE SHEET; SAID COMPOSITE SHEET BEING FOLDED ON ITSELF TO PROVIDE A PLURALITY OF CONVOLUTIONS; SAID COMPOSITE SHEET BEING SECURED TO SAID HOUSING AND COVERING SAID OPENING AND FUNCTIONING TO ALTER THE EFFECTIVE EMISSIVITY AND ABSORPTIVITY OF SAID HEAT EXCHANGE APPARATUS.
Claim 2
Dependent Claim
98 words
HEAT EXCHANGE APPARATUS COMPRISING: A HOUSING HAVING AT LEAST ONE OPENING IN A WALL THEREOF; METALLIC SHEET MEANS INCLUDING A PLURALITY OF SECTIONS; EACH OF SAID SECTIONS INCLUDING A PAIR OF INDIVIDUAL SHEET MEMBERS HAVING HIGH AND LOW COEFFICIENTS OF THERMAL EXPANSION, RESPECTIVELY; SAID INDIVIDUAL SHEET MEMBERS BEING SECURED TOGETHER IN END-TO-END ABUTTING RELATION TO PROVIDE A COMPOSITE SHEET; SAID COMPOSITE SHEET BEING FOLDED ON ITSELF TO PROVIDE A PLURALITY OF CONVOLUTIONS; SAID COMPOSITE SHEET BEING SECURED TO SAID HOUSING AND COVERING SAID OPENING AND FUNCTIONING TO ALTER THE EFFECTIVE EMISSIVITY AND ABSORPTIVITY OF SAID HEAT EXCHANGE APPARATUS.
References Cited (Backward Citations)
CA619224A
Cited
US2336408A
Cited
US2314412A
Cited
US2561217A
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US2949283A
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US2998962A
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US3024941A
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US3048375A
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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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |