US5687532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire endurance rated plastic articles for use in fire rated assemblies
Assignee: SABIC Global Technologies BV
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Filing: 1996-05-06
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Granted: 1997-11-18
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Expires: 2016-05-06
Abstract
Abstract A plastic article such as a thermoplastic extruded door frame or laminated composite floor for railroad cars having at least one internal cavity wherein the cavity is filled with an intumescent. When exposed to fire, such an article retards or inhibits the break-through of fire into an adjoining compartment or room for a sufficient time to allow occupants thereof to evacuate the adjoining compartment or to extinguish the fire. The article has at least one internal cavity filled with an intumescent and meets the requirements of ASTM E 152. The plastics employed herein may be either thermoplastic or thermoset.
Inventors
- 👤 Bruce M. Torrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:10
CPC Classifications
E; E06; E06B; E06B5/00; E06B5/10; E06B5/16; B; B60; B60P; B60P3/00; B60P3/32; B60P3/36; B61; B61D; B61D17/00; E06B3/00; E06B3/04; E06B3/06; E06B3/08; E06B3/20; E06B3/22; E06B3/221; Y; Y10; Y10S; Y10S49/00; Y10S49/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
27 words
A thermoplastic extruded door frame having an exterior surface and an interior honeycomb configuration forming a plurality of cavities, said cavities being filled with an intrumescent material.
Claim 2
Dependent Claim
27 words
A thermoplastic extruded door frame having an exterior surface and an interior honeycomb configuration forming a plurality of cavities, said cavities being filled with an intrumescent material.
Claim 3
Dependent Claim
10 words
The thermoplasticarticle of claim 1, wherein the thermoplastic is acrylonitrile-butadiene-styrene.
Claim 4
Dependent Claim
13 words
The plastic article of claim 1, wherein the thermoset plastic is phenol formaldehyde.
Claim 5
Dependent Claim
61 words
A thermoplastic extruded door frame in accordance with claim 1 having a 30 minute fire endurance rating meeting ASTME 152 test wherein a door assembly is exposed to furnace temperatures of 1000° F. at 5 minutes after start of said test, 1300° F. at 10 minutes after start of said test, and 1550° at 30 minutes after start of said test.
References Cited (Backward Citations)
US4660338A
Cited
US4649089A
Cited
US4850173A
Cited
US4706426A
Cited
US5088249A
Cited
US5347780A
Cited
US5279087A
Cited
US5501045A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-17 | 2001-05-19 | 2001-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-17 | 2005-05-19 | 2005-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-17 | 2009-05-19 | 2009-11-18 | $7700.00 | Window Closed / Lapsed |