Patent US2709651A successfully refreshed from Google Patents.
US2709651A
Expired / Lapsed
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Method of controlling the density of sintered compacts
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1952-05-02
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Granted: 1955-05-31
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Expires: 1972-05-02
Abstract
No abstract record available.
Inventors
- 👤 Raymond S Gurnick
- 👤 Robert T Joy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:25
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN THE METHOD OF MAKING A POROUS SINTERED METAL ARTICLE OF PREDETERMINED DIMENSIONS AND DENSITY WHEREIN A PREFORMED PLASTIC MASS CONTAINING METAL PARTICLES AND 35 TO 50 VOLUME PERCENT OF A HEAT-FUGITIVE DEPOLYMERIZABLE POLY-MONO-OLEFINIC RESIN BINDER ARE HEATED TO A SINTERING TEMPERATURE IN THE PRESENCE OF A NON-OXIDIZING PROTECTIVE GAS, THE STEP OF DIRECTING SAID PROTECTIVE GAS AS A STREAM PAST SAID ARTICLE AT LESS THAN A TURBULENT RATE AND A RATE SUFFICIENT THAT THE CONTENT OF MATERIALS LIBERATED FROM SAID BINDER DURING SAID HEATING IN SAID STREAM DOES NOT EXCEED ABOUT 75% BY VOLUME.
Claim 2
Dependent Claim
95 words
IN THE METHOD OF MAKING A POROUS SINTERED METAL ARTICLE OF PREDETERMINED DIMENSIONS AND DENSITY WHEREIN A PREFORMED PLASTIC MASS CONTAINING METAL PARTICLES AND 35 TO 50 VOLUME PERCENT OF A HEAT-FUGITIVE DEPOLYMERIZABLE POLY-MONO-OLEFINIC RESIN BINDER ARE HEATED TO A SINTERING TEMPERATURE IN THE PRESENCE OF A NON-OXIDIZING PROTECTIVE GAS, THE STEP OF DIRECTING SAID PROTECTIVE GAS AS A STREAM PAST SAID ARTICLE AT LESS THAN A TURBULENT RATE AND A RATE SUFFICIENT THAT THE CONTENT OF MATERIALS LIBERATED FROM SAID BINDER DURING SAID HEATING IN SAID STREAM DOES NOT EXCEED ABOUT 75% BY VOLUME.
References Cited (Backward Citations)
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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) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |