Patent US4801496A successfully refreshed from Google Patents.
US4801496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite member with integrated thermal protection
Assignee: Boeing Co
•
Filing: 1986-06-24
•
Granted: 1989-01-31
•
Expires: 2006-06-24
Abstract
Abstract A fire wall constructed of a composite materials (10) includes a fire-protecting layer of intumescent material (16) integrated into the structure thereof. A plurality of layers of composite material (18) are laminated together to form the fire wall. An outer layer (14) is a shielding material such as fiber glass. Another layer (16) is an intumescent material in juxtapositional relationship between the outer shielding layer (14) and the composite layers (18). The shielding layer (14) and the intumescent layer (16) are co-cured with the composite layers (18) to make a fire wall having integrated fire-protection that is immediately usable without need of additional thermal protection materials.
Inventors
- 👤 Daniel A. Buchacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:38
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; E04B1/941; B; B32; B32B; B32B5/00; B32B5/02; E04B1/942; B32B2262/00; B32B2262/10; B32B2262/101; B32B2305/00; B32B2305/34; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2605/00; B32B2605/18; B32B2607/00; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/92; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249972; Y10T428/249973; Y10T428/249974; Y10T442/00; Y10T442/60; Y10T442/696; Y10T442/699
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
85 words
A fire-protected composite structural member, for use as a construction material such as a firewall and the like, comprising: a plurality of layers of composite material; an outer layer of shielding material, wherein said shielding material softens upon exposure to fire; and a layer of intumescent material, said intumescent layer being in juxtapositional relationship between said shielding layer and said layers of composite material, wherein said composite layers, said intumescent layer and said shielding layer are cured together so as to form said structural member.
Claim 2
Dependent Claim
85 words
A fire-protected composite structural member, for use as a construction material such as a firewall and the like, comprising: a plurality of layers of composite material; an outer layer of shielding material, wherein said shielding material softens upon exposure to fire; and a layer of intumescent material, said intumescent layer being in juxtapositional relationship between said shielding layer and said layers of composite material, wherein said composite layers, said intumescent layer and said shielding layer are cured together so as to form said structural member.
Claim 3
Dependent Claim
20 words
The structural member of claim 1, wherein said intumescent layer includes a plurality of microballoons embedded in said intumescent material.
Claim 4
Dependent Claim
16 words
The structural member of claim 1, wherein said shielding material is a fiber glass impregnated fabric.
Claim 5
Independent Claim
97 words
A method of forming a fire-protected composite structural member, comprising the following steps; providing a plurality of layers of resin-impregnated composite material; laying up said composite layers in juxtapositional relationship to each other; providing a layer of intumescent material; laying up said intumescent layer adjacent an outer layer of said composite layers, and in juxtapositional relationship therewith; providing a layer of shielding material; laying up said shielding layer adjacent said intumescent layer and in juxtapositional relationship therewith; and curing said composite layers, said intumescent layer and said shielding layer together, to form an integrated composite structural member.
Claim 6
Independent Claim
97 words
A method of forming a fire-protected composite structural member, comprising the following steps; providing a plurality of layers of resin-impregnated composite material; laying up said composite layers in juxtapositional relationship to each other; providing a layer of intumescent material; laying up said intumescent layer adjacent an outer layer of said composite layers, and in juxtapositional relationship therewith; providing a layer of shielding material; laying up said shielding layer adjacent said intumescent layer and in juxtapositional relationship therewith; and curing said composite layers, said intumescent layer and said shielding layer together, to form an integrated composite structural member.
Claim 7
Dependent Claim
17 words
The method of claim 4, including embedding a plurality of microballoons into said layer of intumescent material.
References Cited (Backward Citations)
US2912392A
Cited
US3320087A
Cited
US3336153A
Cited
US3816226A
Cited
US3934066A
Cited
US4048363A
Cited
US4175162A
Cited
US4114369A
Cited
US4299872A
Cited
US4265953A
Cited
US4522673A
Cited
US4767656A
Cited
US4756945A
Cited
US4686244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |