Patent US3914490A successfully refreshed from Google Patents.
US3914490A
Expired / Lapsed
US
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Ceramic fiber gasket
Assignee: Dana Inc
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Filing: 1973-08-01
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Granted: 1975-10-21
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Expires: 1993-08-01
Abstract
Abstract A gasket is made by applying a mixture including ceramic fibers, inert clay and water to the top and bottom surfaces of a double sided perforated metal core. The surfaces are smoothed and dried. The assembly is subsequently calendered to a predetermined thickness and individual gaskets are then cut from the assembly.
Inventors
- 👤 Michael P Fusiek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:37
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/122; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24033; Y10T428/24273; Y10T428/24281; Y10T428/24289; Y10T428/249921; Y10T428/249924; Y10T428/249932
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
60 words
A GASKET COMPRISING A METAL CORE INCLUDING PERFORATIONS DEFINING PRONGS EXTENDING FROM BOTH SIDES THEREOF AND A CERAMIC FIBER LAYER ATTACHED TO BOTH SIDES OF SAID CORE, SAID LAYER COMPRISING A MIXTURE OF CERAMIC FIBERS, AN INERT AND SUBSTANTIALLY WATER INSOLUBLE FILLER, PORTLAND CEMENT AND A GREEN BINDER SELECTED FROM THE CLASS CONSISTING OF POLYVINYL ACETATE, POLYVINYL CHLORIDE AND NEOPRENE.
Claim 2
Dependent Claim
60 words
A GASKET COMPRISING A METAL CORE INCLUDING PERFORATIONS DEFINING PRONGS EXTENDING FROM BOTH SIDES THEREOF AND A CERAMIC FIBER LAYER ATTACHED TO BOTH SIDES OF SAID CORE, SAID LAYER COMPRISING A MIXTURE OF CERAMIC FIBERS, AN INERT AND SUBSTANTIALLY WATER INSOLUBLE FILLER, PORTLAND CEMENT AND A GREEN BINDER SELECTED FROM THE CLASS CONSISTING OF POLYVINYL ACETATE, POLYVINYL CHLORIDE AND NEOPRENE.
Claim 3
Dependent Claim
11 words
The gasket of claim 1 wherein said ceramic fibers are alumina-silica.
Claim 4
Dependent Claim
23 words
The gasket of claim 1 wherein said fibers have a fiber diameter of about 2.8 microns and an average length of 1 inch.
Claim 5
Dependent Claim
11 words
The gasket of claim 3 wherein said ceramic fibers are alumina-silica.
Claim 6
Dependent Claim
32 words
The gasket of claim 1 wherein said ceramic fiber layers are attached to said perforated metal core by bending the ends of said core prongs to clinch said layers to said core.
Claim 7
Dependent Claim
11 words
The gasket of claim 5 wherein said ceramic fibers are alumina-silica.
Claim 8
Dependent Claim
12 words
The gasket of claim 6 wherein said green binder is polyvinyl acetate.
Claim 9
Dependent Claim
22 words
The gasket of claim 7 wherein said fibers have a diameter of about 2.8 microns and an average length of 1 inch.
References Cited (Backward Citations)
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Cited
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |