US2945759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for measuring the strength of sintered ferrous articles
Assignee: Motors Liquidation Co
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Filing: 1957-09-19
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Granted: 1960-07-19
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Expires: 1977-09-19
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Shaw
- 👤 Frederick W Sampson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:53
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0207; C22C33/0228; F; F16; F16D; F16D69/00; F16D69/02; F16D69/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A METHOD FOR INCREASING THE STRENGTH OF SINTERED FERROUS ARTICLES MADE FROM BRIQUETTED AND SINTERED METAL POWDER INCLUDING GRAPHITE IN QUANTITIES OF FROM 20% TO 32% BY WEIGHT, THE STEP OF ADDING GRAPHITE IN QUANTITIES OF FROM 20% TO 32% BY WEIGHT TO THE METAL POWDER PRIOR TO BRIQUETTING AND SINTERING, CONSISTING OF, A MIXTURE OF POWDERED ARTIFICIAL GRAPHITE OF -325 MESH AND NATURAL FLAKE GRAPHITE OF 20 TO 30 MESH WHEREIN PROPORTIONS OF ONE OF SAID GRAPHITE COMPONENTS VARIES BETWEEN 16 2/3% TO 83 1/3% BY WEIGHT OF THE TOTAL GRAPHITE MIXTURE WITH THE OTHER COMPONENT MAKING UP THE REMAINDER.
Claim 2
Dependent Claim
102 words
IN A METHOD FOR INCREASING THE STRENGTH OF SINTERED FERROUS ARTICLES MADE FROM BRIQUETTED AND SINTERED METAL POWDER INCLUDING GRAPHITE IN QUANTITIES OF FROM 20% TO 32% BY WEIGHT, THE STEP OF ADDING GRAPHITE IN QUANTITIES OF FROM 20% TO 32% BY WEIGHT TO THE METAL POWDER PRIOR TO BRIQUETTING AND SINTERING, CONSISTING OF, A MIXTURE OF POWDERED ARTIFICIAL GRAPHITE OF -325 MESH AND NATURAL FLAKE GRAPHITE OF 20 TO 30 MESH WHEREIN PROPORTIONS OF ONE OF SAID GRAPHITE COMPONENTS VARIES BETWEEN 16 2/3% TO 83 1/3% BY WEIGHT OF THE TOTAL GRAPHITE MIXTURE WITH THE OTHER COMPONENT MAKING UP THE REMAINDER.
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) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |