Patent US4672230A successfully refreshed from Google Patents.
US3608535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealant for wear-resistant coating
Assignee: Outboard Marine Corp
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Filing: 1968-11-06
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Granted: 1971-09-28
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Expires: 1988-11-06
Abstract
Abstract Disclosed herein is the impregnation of a sealant in the pores of the wear-resistant coating on the cylinders or combustion chamber of an internal combustion engine to prevent corrosion of the underlying cylinder walls and blistering of the wearresistant coating and to thereby increase the life of the wearresistant coating and the piston seals.
Inventors
- 👤 John H Winston
- 👤 Burzoe K Ghandhi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:35
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
62 words
An internal combustion engine having a housing with internal walls coated with tungsten carbide and a sodium silicate sealant impregnated in the pores of said tungsten carbide and capable of withstanding engine operating temperatures for prolonged periods and preventing penetration to the engine housing of the combustion gas whereby to prevent corrosion at the interface between the tungsten carbide and the housing.
Claim 2
Dependent Claim
62 words
An internal combustion engine having a housing with internal walls coated with tungsten carbide and a sodium silicate sealant impregnated in the pores of said tungsten carbide and capable of withstanding engine operating temperatures for prolonged periods and preventing penetration to the engine housing of the combustion gas whereby to prevent corrosion at the interface between the tungsten carbide and the housing.
Claim 3
Dependent Claim
62 words
An internal combustion engine having a housing with internal walls coated with tungsten carbide and a polyester resin sealant impregnated in the pores of said tungsten carbide and capable of withstanding engine operating temperatures for prolonged periods and preventing penetration to the engine housing of the combustion gas whereby to prevent corrosion at the interface between the tungsten carbide and the housing.
Claim 4
Dependent Claim
62 words
An internal combustion engine having a housing with internal walls coated with tungsten carbide and a polyester resin sealant impregnated in the pores of said tungsten carbide and capable of withstanding engine operating temperatures for prolonged periods and preventing penetration to the engine housing of the combustion gas whereby to prevent corrosion at the interface between the tungsten carbide and the housing.
References Cited (Backward Citations)
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Cited
US3214287A
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US3289649A
Cited
US3364065A
Cited
US3318515A
Cited
US3394877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |