US2696434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing cylinder sleeves
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1947-10-02
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Granted: 1954-12-07
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Expires: 1967-10-02
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Bartlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:06
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/24; B22F3/26; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/4927; Y10T29/49272
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE PROCESS OF MAKING A CYLINDER SLEEVE WHICH INCLUDES THE STEPS OF PRODUCING A CYLINDER BRIQUETTE BY A POWDER METALLURGICAL PROCESS AS A COHERENT ARTICLE HAVING A POROUS SKELETON STRUCTURE, COMPLETELY IMPREGNATING THE BRIQUETTE WITH METAL TO FORM A NON-POROUS CYLINDRICAL SLEEVE HAVING AN INNER BORE FACE AND AN OUTER WALL, AND ETCHING THE BORE FACE TO DISSOLVE OUT THE IMPREGNATING METAL THEREFROM TO A DEPTH OUTWARD FROM THE BORE FACE TO PROVIDE A POROUS LUBRICANT RETAINING ZONE IN THE BORE FACE AND MATERIALLY INWARD FROM THE OUTER WALL TO PRESERVE A NON-POROUS WALL OF APPRECIABLE THICKNESS EXTENDING FROM SAID ZONE TO THE OUTER WALL.
Claim 2
Dependent Claim
105 words
THE PROCESS OF MAKING A CYLINDER SLEEVE WHICH INCLUDES THE STEPS OF PRODUCING A CYLINDER BRIQUETTE BY A POWDER METALLURGICAL PROCESS AS A COHERENT ARTICLE HAVING A POROUS SKELETON STRUCTURE, COMPLETELY IMPREGNATING THE BRIQUETTE WITH METAL TO FORM A NON-POROUS CYLINDRICAL SLEEVE HAVING AN INNER BORE FACE AND AN OUTER WALL, AND ETCHING THE BORE FACE TO DISSOLVE OUT THE IMPREGNATING METAL THEREFROM TO A DEPTH OUTWARD FROM THE BORE FACE TO PROVIDE A POROUS LUBRICANT RETAINING ZONE IN THE BORE FACE AND MATERIALLY INWARD FROM THE OUTER WALL TO PRESERVE A NON-POROUS WALL OF APPRECIABLE THICKNESS EXTENDING FROM SAID ZONE TO THE OUTER WALL.
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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) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |