Patent US4450810A successfully refreshed from Google Patents.
US4299872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intumescent material-honeycomb thermal barrier
Assignee: United States Department of the Navy
•
Filing: 1979-09-21
•
Granted: 1981-11-10
•
Expires: 1999-09-21
Abstract
Abstract A thermal barrier comprising a heat responsive intumescent insulating matal partially filling open cells in a layer of fire retardant honeycomb material. The thermal barrier is adhesively bonded to the inner surface of an aircraft skin panel. The intumescent material is in thermal contact with the skin and expands in response to heat conducted through the skin. The intumescent material may comprise one or more of a wide variety of matrix systems and fillers. Interior upholstery adhesively bonded to the honeycomb material completes the thermal barrier installation.
Inventors
- 👤 Anthony S. Miguel
- 👤 John L. Perry
- 👤 Gary R. Wittman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:06
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; F; F16; F16L; F16L59/00; F16L59/02; F16L59/029; B32B2305/00; B32B2305/02; B32B2305/028; B32B2305/30; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S428/00; Y10S428/92; Y10S428/921; Y10S521/00; Y10S521/907; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24157
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
A thermal barrier comprising: a layer of fire-retardant honeycomb material having a plurality of open cells; an exterior panel connected to said honeycomb material for closing the side of said honeycomb material expected to undergo a temperature increase; and an intumescent insulating material partially filling said cells, said intumescent insulator bonded to said cells and against said exterior panel for decomposing into an expanded foam when heated, such that a fire-resistant layer filling said cells is formed and where said intumescent insulating material is selected from the group consisting of epoxy resin, vinyl resin, silicone resin, sodium silicate, silicone rubber, butyl rubber, magnesium oxide and magnesium chloride.
Claim 2
Dependent Claim
107 words
A thermal barrier comprising: a layer of fire-retardant honeycomb material having a plurality of open cells; an exterior panel connected to said honeycomb material for closing the side of said honeycomb material expected to undergo a temperature increase; and an intumescent insulating material partially filling said cells, said intumescent insulator bonded to said cells and against said exterior panel for decomposing into an expanded foam when heated, such that a fire-resistant layer filling said cells is formed and where said intumescent insulating material is selected from the group consisting of epoxy resin, vinyl resin, silicone resin, sodium silicate, silicone rubber, butyl rubber, magnesium oxide and magnesium chloride.
Claim 3
Dependent Claim
44 words
A thermal barrier as described in claim 1 wherein said intumescent insulating material that decomposes into an expanded foam further comprises a filler selected from the group consisting of graphite fiber, asbestos, hydrous mica, glass, perlite, borax, potasium nitrate, nylon, sand and aluminum hydroxide.
Claim 4
Dependent Claim
35 words
A thermal barrier as described in claim 1 or claim 2 further comprising an interior layer connected to said honeycomb for closing the side of said honeycomb material not expected to undergo a temperature increase.
References Cited (Backward Citations)
US2744042A
Cited
US2753642A
Cited
US2684953A
Cited
US3235441A
Cited
US3053714A
Cited
US3000020A
Cited
US3249659A
Cited
US3210233A
Cited
US3320087A
Cited
US3364097A
Cited
US3321154A
Cited
US3475262A
Cited
US3466222A
Cited
US3567162A
Cited
US3644158A
Cited
US3663267A
Cited
US3730891A
Cited
US3840425A
Cited
US3934066A
Cited
US3916057A
Cited
US4088723A
Cited
US4052526A
Cited
US4018962A
Cited
US4054477A
Cited
US4061812A
Cited
US4135019A
Cited
US4251579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |