US3131779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Erosion resistant nozzle assembly and method for forming
Assignee: Jersey Production Research Co
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Filing: 1962-02-01
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Granted: 1964-05-05
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Expires: 1982-02-01
Abstract
No abstract record available.
Inventors
- 👤 David S Rowlcy
- 👤 Harold C Bridwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:53
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/60; E21B10/61; E21B10/602; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12139
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
113 words
AN IMPROVED DRILL BIT COMPRISING A HOLLOW BIT BODY CONTAINING AT LEAST ONE DISCHARGE PORT IN THE LOWER SURFACE THEREOF, A STEEL SLEEVE WELDED IN SAID DISCHARGE PORT, A MATRIX METAL CONTAINING FINELY DIVIDED HARD METAL CARBIDE BONDED TO THE INNER SURFACE OF SAID SLEEVE; A TUBULAR NOZZLE OF HARD METAL CARBIDE HAVING A ROCKWELL A HARDNESS IN EXCESS OF ABOUT 85 BONDED WITHIN SAID SLEEVE BY SAID MATRIX METAL, AND AT LEAST ONE CUTTING ELEMENT DEPENDING FROM SAID BIT BODY ADJACENT SAID DISCHARGE PORT, SAID MATRIX METAL MELTING BETWEEN ABOUT 1550*F. AND ABOUT 2400*F. AND IN THE MOLTEN STATE HAVING THE ABILITY TO WET SAID STEEL SLEEVE AND SAID METAL CARBIDE NOZZLE.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |