Patent US3312508A successfully refreshed from Google Patents.
Patent US2518253A successfully refreshed from Google Patents.
US2518253A
Expired / Lapsed
US
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Metallic sealing ring
Assignee: American Measuring Instruments Corp
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Filing: 1949-04-14
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Granted: 1950-08-08
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Expires: 1969-04-14
Abstract
No abstract record available.
Inventors
- 👤 Reis Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:47
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/24; B22F3/26; Y; Y10; Y10S; Y10S164/00; Y10S164/07; Y10S277/00; Y10S277/922; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49274; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12021; Y10T428/1216
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A METHOD FOR THE MANUFACTURE OF A SEALING RING COMPRISING PRODUCING THE RING BY A POWDER METALLURGICAL PROCESS AS A COHERENT ARTICLE HAVING A THROUGHOUT POROUS SKELETON STRUCTURE, APPLYING AT AN ELEVATED TEMPERATURE TO AT LEAST ONE SURFACE OF THE RING A CONTROLLED QUANTITY OF A NON-AQUEOUS ORGANIC WETTING LIQUID, PARTLY DECOMPOSING THE LIQUID AND COVERING THE PORES OF SAID SURFACE LAYER WITH A FILM FORMED OF THE DECOMPOSITION PRODUCTS WHICH IS REPULSIVE TO IMPREGNATION WITH A MOLTEN METAL, PRESERVING AT THE SAME TIME THE POROUS SKELETON STRUCTURE OF SAID SURFACE LAYER AND CREATING A LUBRICANT RETAINING SELF-LUBRICATING FACE OF UNRESTRAINED GAS PERMEABILITY AND IMPREGNATING THE REMAINING MAIN PART OF THE RING WITH MOLTEN METAL THROUGH AT LEAST ONE OF THE UNTREATED FACES OF THE RING.
Claim 2
Independent Claim
126 words
A METHOD FOR THE MANUFACTURE OF A SEALING RING COMPRISING PRODUCING THE RING BY A POWDER METALLURGICAL PROCESS AS A COHERENT ARTICLE HAVING A THROUGHOUT POROUS SKELETON STRUCTURE, APPLYING AT AN ELEVATED TEMPERATURE TO AT LEAST ONE SURFACE OF THE RING A CONTROLLED QUANTITY OF A NON-AQUEOUS ORGANIC WETTING LIQUID, PARTLY DECOMPOSING THE LIQUID AND COVERING THE PORES OF SAID SURFACE LAYER WITH A FILM FORMED OF THE DECOMPOSITION PRODUCTS WHICH IS REPULSIVE TO IMPREGNATION WITH A MOLTEN METAL, PRESERVING AT THE SAME TIME THE POROUS SKELETON STRUCTURE OF SAID SURFACE LAYER AND CREATING A LUBRICANT RETAINING SELF-LUBRICATING FACE OF UNRESTRAINED GAS PERMEABILITY AND IMPREGNATING THE REMAINING MAIN PART OF THE RING WITH MOLTEN METAL THROUGH AT LEAST ONE OF THE UNTREATED FACES OF THE RING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |