US3756902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal insulation for flat or tubular structural elements
Assignee: Hamburger Flugzeugbau GmbH
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Filing: 1971-02-16
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Granted: 1973-09-04
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Expires: 1991-02-16
Abstract
Abstract A BODY TO BE THERMALLY INSULATED FROM ITS SURROUNDINGS, SUCH AS AN INSTRUMENT HOUSING OR A DUCT, HAS ITS EXPOSED SURFACE SHIELDED BY ONE OR MORE FOILS OF METAL OR POLYMERIC MATERIAL SEPARATED FROM THE SURFACE, AND POSSIBLY FROM ONE ANOTHER, BY TRANSVERSELY SPACED UNDULATING PROFILES WITH FLATTENED BASES ON ONE SIDE AND ROUNDED CRESTS OF SMALL RADIUS OF CURVATURE ON THE OTHER SIDE. THE FLATTENED BASES SERVE FOR THE MOUNTING OF THE PROFILES ON THE FOIL OR FOILS WHEREAS THE ROUNDED CRESTS MINIMIZE THE AREA OF CONTACT BETWEEN THE INSULATION AND THE PROTECTED SURFACE.
Inventors
- 👤 J Konecny
- 👤 J Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:16
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/06; F16L59/07; F16L59/10; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12326; Y10T428/1234; Y10T428/12347; Y10T428/12354; Y10T428/12389; Y10T428/12396; Y10T428/1241; Y10T428/12493; Y10T428/12535; Y10T428/12771; Y10T428/12861; Y10T428/12889; Y10T428/24; Y10T428/24174; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/24711; Y10T428/24727; Y10T428/24744
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |