US4849295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature metal rubber gasket
Assignee: Eagle Picher Industries Inc
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Filing: 1987-12-11
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Granted: 1989-07-18
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Expires: 2007-12-11
Abstract
Abstract A metal rubber gasket includes a central metal lamina sandwiched by two outer elastomer layers. The elastomer is a blend of a butadiene-acrylonitrile rubber and a random terpolymer of ethylene, alkyl acrylate and the mono alkyl ester of a dioic acid. Preferably the butadiene-acrylonitrile rubber is functionally modified with polar groups such as a carboxyl, amine, or hydroxyl groups.
Inventors
- 👤 Randy L. Dickerman
- 👤 Wayne R. Melchior
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:48
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/122; C09K2003/1084; C09K2200/00; C09K2200/06; C09K2200/0607; C09K2200/0612; C09K2200/0642; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
67 words
A high temperature laminated gasket including a compressible polymeric layer adhered to a metal layer, said polymeric layer comprising a blend of a terpolymer comprising a random terpolymer of ethylene C 1 -C 6 , alkyl acrylate and C 4 -C 6 monoalkyl ester of butene dioic acid and a second polymer comprising acrylonitrile butadiene, wherein said polymeric layer comprising 2-15% terpolymer, and 44-64% carboxylated acrylonitrile butadiene.
Claim 2
Dependent Claim
67 words
A high temperature laminated gasket including a compressible polymeric layer adhered to a metal layer, said polymeric layer comprising a blend of a terpolymer comprising a random terpolymer of ethylene C 1 -C 6 , alkyl acrylate and C 4 -C 6 monoalkyl ester of butene dioic acid and a second polymer comprising acrylonitrile butadiene, wherein said polymeric layer comprising 2-15% terpolymer, and 44-64% carboxylated acrylonitrile butadiene.
Claim 3
Dependent Claim
20 words
The laminated gasket claimed in claim 1 wherein said carboxylated acrylonitrile butadiene has at least two carboxyl groups per molecule.
Claim 4
Dependent Claim
31 words
The laminated gasket claimed in claim 1 wherein C 1 -C 6 mono alkyl of 1,4-butene dioic acid is selected from the group consisting of methyl, butyl and propyl hydrogen maleate.
Claim 5
Dependent Claim
67 words
A gasket comprising a metal layer, a primer layer and compression layer said primer layer comprising a blend of phenol formaldehyde resin and acrylonitrile butadiene; said compression layer carboxylated acrylonitrile butadiene and a random copolymer of ethylene, C 1 -C 6 alkyl acrylate and mono C 1 -C 6 alkyl ester of a dioic acid wherein said compression layer comprises 2-15% terpolymer and 44-64% carboxylated acrylonitrile butadiene.
Claim 6
Dependent Claim
67 words
A gasket comprising a metal layer, a primer layer and compression layer said primer layer comprising a blend of phenol formaldehyde resin and acrylonitrile butadiene; said compression layer carboxylated acrylonitrile butadiene and a random copolymer of ethylene, C 1 -C 6 alkyl acrylate and mono C 1 -C 6 alkyl ester of a dioic acid wherein said compression layer comprises 2-15% terpolymer and 44-64% carboxylated acrylonitrile butadiene.
Claim 7
Dependent Claim
19 words
The gasket claimed in claim 4 whrein said carboxylated acrylonitrile butadiene has at least two carboxyl groups per molecule.
Claim 8
Dependent Claim
32 words
The laminated gasket claimed in claim 4 wherein C 1 -C 6 mono alkyl ester of 1,4-butene dioic acid is selected from the group consisting of methyl, butyl and propyl hydrogen maleate.
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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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |