Patent US5135793A successfully refreshed from Google Patents.
US5135793A
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US
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Fiberglass reinforced polyester laminated hardboard panels
Assignee: Crane Composites Inc
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Filing: 1990-05-24
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Granted: 1992-08-04
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Expires: 2010-05-24
Abstract
Abstract A laminate having high strength and excellent resistance to moisture comprised of a fiberglass reinforced polyester panel adhesively attached with a water reactive adhesive to a tempered hardboard panel.
Inventors
- 👤 Robert P. Socha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:48
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/36; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/088; B32B21/00; B32B21/02; B32B21/04; B32B21/08; B32B7/00; B32B7/04; B32B7/12; C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; B29K; B29K2067/00; B29K2067/06; B29K2309/00; B29K2309/08; B29K2711/00; B29K2711/14; B32B2262/00; B32B2262/10; B32B2262/101; B32B2305/00; B32B2305/08; B32B2307/00; B32B2307/70; B32B2307/72; B32B2605/00; C08J2367/00; C08J2367/06; Y; Y10; Y10S; Y10S52/00; Y10S52/07; Y10T; Y10T428/00; Y10T428/23; Y10T428/237; Y10T428/249921; Y10T428/249924; Y10T428/249925; Y10T428/25; Y10T428/253; Y10T428/31504; Y10T428/31551; Y10T428/31565; Y10T428/31591; Y10T428/31634; Y10T428/31786; Y10T428/3179; Y10T428/31971; Y10T428/31989
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
45 words
A laminate comprising a fiber glass reinforced polyester panel adhesively attached by means of a water reactive adhesive to a tempered hardboard panel, wherein said laminated has a modulus of rupture greater than 5000 p.s.i. and a twenty-four hour water absorption of less than 5.0%.
Claim 2
Dependent Claim
45 words
A laminate comprising a fiber glass reinforced polyester panel adhesively attached by means of a water reactive adhesive to a tempered hardboard panel, wherein said laminated has a modulus of rupture greater than 5000 p.s.i. and a twenty-four hour water absorption of less than 5.0%.
Claim 3
Dependent Claim
15 words
The laminate of claim 1, wherein said modulus of rupture is greater than 10,000 p.s.i.
Claim 4
Dependent Claim
57 words
A laminate comprising a fiberglass reinforced polyester panel adhesively attached by means of a water reactive adhesive to a tempered hardboard substrate, wherein said tempered hardboard is prepared using a water phenol based water resistant binder, said laminate has a modulus of rupture greater than 5000 p.s.i. and a twenty-four hour water absorption of less than 5.0%.
Claim 5
Dependent Claim
57 words
A laminate comprising a fiberglass reinforced polyester panel adhesively attached by means of a water reactive adhesive to a tempered hardboard substrate, wherein said tempered hardboard is prepared using a water phenol based water resistant binder, said laminate has a modulus of rupture greater than 5000 p.s.i. and a twenty-four hour water absorption of less than 5.0%.
Claim 6
Dependent Claim
22 words
The laminate of claim 3, wherein said hardboard has a density of about 65 lbs/ft 3 to about 75 lbs/ft 3 .
Claim 7
Dependent Claim
16 words
The laminate of claim 3, wherein said modulus of rupture is greater than about 10,000 p.s.i.
Claim 8
Dependent Claim
14 words
The laminate of claim 5, wherein said adhesive is a highsolids water activated urethane.
Claim 9
Dependent Claim
23 words
The laminate of claim 3, wherein said fiberglass reinforced polyester panel is attached to said tempered hardboard through a vacuum bag cure procedure.
Claim 10
Dependent Claim
18 words
The laminate of claim 7 wherein the density of said laminate is greater than 65 lbs/ft 3 .
References Cited (Backward Citations)
US2784763A
Cited
US3145502A
Cited
US2927623A
Cited
US3077000A
Cited
US3413188A
Cited
US3756901A
Cited
US4082882A
Cited
US4315967A
Cited
US4587141A
Cited
US4695501A
Cited
US4828643A
Cited
US4824507A
Cited
US4923756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-04 | 2000-02-03 | 2000-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-04 | 2004-02-03 | 2004-08-04 | $7700.00 | Window Closed / Lapsed |