US4355068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnated gasket and method of producing
Assignee: Goetze GmbH
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Filing: 1981-11-13
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Granted: 1982-10-19
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Expires: 2001-11-13
Abstract
Abstract In a gasket made of a fibrous and/or porous material impregnated with a polymerizable saturating agent which is partially polymerized only to a plastically deformable consistency, an additive which prevents complete polymerization and hardening is applied to the surfaces of the gasket after impregnation with the saturating agent and partial polymerization.
Inventors
- 👤 Horst Beyer
- 👤 Hans-Reiner Zerfass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:37
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/122; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/31504; Y10T428/31652; Y10T428/31656; Y10T442/00; Y10T442/20; Y10T442/2926
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
53 words
In a gasket made of a fibrous and/or porous material impregnated with a polymerizable saturating agent which is partially polymerized only to a plastically deformable consistency, the improvement comprising an additive which prevents complete polymerization and hardening applied to the surfaces of said material after impregnation with said saturation agent and partial polymerization.
Claim 2
Dependent Claim
53 words
In a gasket made of a fibrous and/or porous material impregnated with a polymerizable saturating agent which is partially polymerized only to a plastically deformable consistency, the improvement comprising an additive which prevents complete polymerization and hardening applied to the surfaces of said material after impregnation with said saturation agent and partial polymerization.
Claim 3
Dependent Claim
16 words
Gasket as defined in claim 1 wherein said material is a metal reinforced asbestos fiber plate.
Claim 4
Dependent Claim
16 words
Gasket as defined in claim 1 or 2 wherein said gasket is a cylinder head gasket.
Claim 5
Dependent Claim
70 words
In a method for producing a gasket composed of a plate of a fibrous and/or porous material, which method includes impregnating the plate with a polymerizable liquid saturating agent and partially polymerizing the agent to a plastically deformable consistency, the improvement comprising, after said steps of impregnating and partially polymerizing, applying to the surfaces of said plate an additive which prevents premature complete polymerization and hardening of said saturating agent.
Claim 6
Dependent Claim
70 words
In a method for producing a gasket composed of a plate of a fibrous and/or porous material, which method includes impregnating the plate with a polymerizable liquid saturating agent and partially polymerizing the agent to a plastically deformable consistency, the improvement comprising, after said steps of impregnating and partially polymerizing, applying to the surfaces of said plate an additive which prevents premature complete polymerization and hardening of said saturating agent.
Claim 7
Dependent Claim
22 words
Method as defined in claim 4 wherein said step of applying comprises impregnating the gasket plate with a solution of the additive.
Claim 8
Dependent Claim
35 words
Method as defined in claim 4 wherein said step of applying comprises covering at least one side of the plate with a coating layer of a carrier material which has been saturated with the additive.
Claim 9
Dependent Claim
30 words
Method as defined in claim 4 wherein said step of applying comprises covering at least one side of the plate with a cover layer containing large amounts of the additive.
Claim 10
Dependent Claim
20 words
Method as defined in claim 4, 6 or 7 wherein the layer containing the additive can be removed before installation.
Claim 11
Dependent Claim
26 words
Method as defined in claim 4, 5, 6 or 7 wherein the saturating agent is a completely polymerizable substance and the additive is an aging protectant.
References Cited (Backward Citations)
US3970322A
Cited
US4201804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |