Patent US2712988A successfully refreshed from Google Patents.
US2712988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Industrial drilling tools
Assignee: Individual
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Filing: 1952-02-29
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Granted: 1955-07-12
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Expires: 1972-02-29
Abstract
No abstract record available.
Inventors
- 👤 Kurtz Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:49
CPC Classifications
B; B23; B23P; B23P5/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/932; Y10S76/00; Y10S76/12; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12139
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
153 words
AS AN ARTICLE OF MANUFACTURE, A DRILL BIT COMPRISING HARD SHARP CUTTING PARTICLES COMPRISING ONE OF THE MATERIALS FROM THE GROUP CONSISTING OF DIAMONDS AND METALLIC CARBIDES EMBEDDED IN A PRESSED AND SINTERED ALLOY OF HOMOGANEOUS COMPOSITION, HIGH STRENGTH AND HARDNESS, HIGH THERMAL EXPANSION AND HIGH ABRASION AND SHOCK RESISTANCE COMPRISING 90-60% BY WEIGHT OF A FIRST SEPARATELY PREPARAED MIXTURE AND 10-40% BY WEIGHT OF A SECOND SEPARATELY PREPARED MIXTURE IN WHICH SAID FIRST MIXTURE COMPRISES 94% BY WEIGHT OF AT LEAST ONE METAL CARBIDE OF THE GROUP CONSISTING OF TUNGSTEN, TITANIUM, ZIRCONIUM, VANADIUM, CHROMIUM, TANTALUM AND MOLYBDENUM AND 6% BY WEIGHT OF COBALT AND SAID MIXTURE COMPRISES 65% BY WEIGHT OF NICKEL AND BERYLLIUM COMBINED, 25% BY WEIGHT OF MANGANESE AND 10% BY WEIGHT OF COPPER IN WHICH THE BERYLLIUM IS NOT LESS THAN .25% NOR MORE THAN 3.0% OF THE TOTAL OF SAID SECOND MIXTURE AND WELDED TO A METALLIC SHANK.
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) | 1958-07-11 | 1959-01-10 | 1959-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-11 | 1963-01-10 | 1963-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-11 | 1967-01-10 | 1967-07-12 | $7700.00 | Window Closed / Lapsed |