Patent US5498466A successfully refreshed from Google Patents.
US5498466A
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US
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Intumescent composite
Assignee: International Protective Coatings Corp
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Filing: 1993-03-12
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Granted: 1996-03-12
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Expires: 2013-03-12
Abstract
Abstract An intumescent firestop device having a layer of non-curing moldable two-stage intumescent composite and a restraining layer. When the firestop device is installed around a pipe near the wall opening through which the pipe runs, the intumescent composite exudes into the annular space between the pipe and the wall opening thereby forming a cold-gas seal. The composite is a two-stage intumescent composite that contains two different intumescent components that begin to intumesce at two different temperatures to form a hard char.
Inventors
- 👤 Mario Navarro
- 👤 Gabe DiMarino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:21
CPC Classifications
A; A62; A62C; A62C2/00; A62C2/06; A62C2/065; B; B32; B32B; B32B9/00; B32B9/005; B32B9/007; B32B15/00; B32B15/04; B32B9/04; B32B9/041; C; C09; C09K; C09K21/00; C09K21/14; F; F16; F16L; F16L5/00; F16L5/02; F16L5/04; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/24; Y10T428/24942; Y10T428/249921; Y10T428/249953; Y10T428/249954; Y10T428/249955; Y10T428/249987; Y10T428/24999; Y10T428/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
65 words
An intumescent composite, comprising: (a) a first intumescent component; (b) a second intumescent component, wherein said first intumescent component inmmesces at a first temperature and said second intumescent component intumesces at a second temperature, wherein said second temperature is different from said first temperature, wherein: said first intumesCent component comprises graphite; and said second intumescent component comprises a polyhydric alcohol and a melamine/uninhibited formaldehyde syrup.
Claim 2
Dependent Claim
65 words
An intumescent composite, comprising: (a) a first intumescent component; (b) a second intumescent component, wherein said first intumescent component inmmesces at a first temperature and said second intumescent component intumesces at a second temperature, wherein said second temperature is different from said first temperature, wherein: said first intumesCent component comprises graphite; and said second intumescent component comprises a polyhydric alcohol and a melamine/uninhibited formaldehyde syrup.
Claim 3
Dependent Claim
26 words
The intumescent composite of claim 1, wherein: said graphite comprises an acid-treated graphite flake; said polyhydric alcohol comprises dipentaerythritol; and said melamine/uninhibited formaldehyde syrup comprises triamino-s-triazine.
Claim 4
Dependent Claim
17 words
The intumescent composite of claim 1, further comprising: (c) a blowing agent; and (d) a char promoter.
Claim 5
Dependent Claim
40 words
The intumescent composite of claim 3, further comprising a binder, wherein said first intumescent component, said second intumescent component, said blowing agent, and said char promoter are suspended in said binder and said intumescent composite is a non-curing, moldable putty.
Claim 6
Dependent Claim
13 words
The intumescent composite of claim 4, wherein said binder comprises a plasticized rubber.
Claim 7
Dependent Claim
49 words
The intumescent composite of claim 5, wherein: said first intumescent component comprises graphite; said second intumescent component comprises a polyhydric alcohol and a melamine/uninhibited formaldehyde syrup; said blowing agent comprises one or more carbonate compounds and one or more polycarbonic acids; and said char promoter comprises a chlorinated paraffin.
Claim 8
Dependent Claim
31 words
The intumescent composite of claim 6, wherein: said graphite comprises an acid-treated graphite flake; said polyhydric alcohol comprises dipentaerythritol; said melamine/uninhibited formaldehyde syrup comprises triamino-s-triazine; and said plasticized rubber comprises polyisobutylene.
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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) | 1999-03-12 | 1999-09-11 | 2000-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-12 | 2003-09-11 | 2004-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-12 | 2007-09-11 | 2008-03-12 | $7700.00 | Window Closed / Lapsed |