US3056734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a straight thread
Assignee: United States Steel Corp
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Filing: 1959-03-12
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Granted: 1962-10-02
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Expires: 1979-03-12
Abstract
No abstract record available.
Inventors
- 👤 James A Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:54
CPC Classifications
B; B23; B23H; B23H3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
221 words
THE METHOD OF MAKING A STRAIGHT THREAD ON A WORKPIECE COMPRISING PROVIDING A WORKPIECE HAVING A CYLINDRICAL SURFACE TO BE THREADED, PROVIDING A NON-ERODIBLE CATHODE DIE HAVING A HELICAL THREAD THEREON, THE THREADED PORTIN OF SAID DIE BEING ARRANGED ON A TAPER WITH THE DIAMETER OF THE CREST OF THE THREADAT ONE END VARYING SLIGHTLY FROM THE ROOT DIAMETER OF THE THREAD TO BE FORMED AND THE DIAMETER OF THE CREST OF THE THREAD AT THE OTHER END VARYING SLIGHTLY FROM THE CREST DIAMETER OF THE THREAD TO BE FORMED, COATING ALL BUT THE CREST OF THE DIE THREADS WITH AN INSULATING MATERIAL, SUPPORTING THE DIE IN AXIAL ALIGNMENT WITH THE WORKPIECE WITH SAID OTHER END OF THE DIE ADJACENT ONE END OF THE CYLINDRICAL SURFACE OF THE WORKPIECE TO BE THREADED, THE END OF THE DIE ADJACENT THE WORKPIECE HAVING THE DIAMETER OF THE CREST OF THE THREAD VARYING ONLY SLIGHTLY FROM THE DIAMETER OF THE CYLINDRICAL SURFACE, THEN CAUSING HELICAL MOTION BETWEEN SAID DIE AND WORKPIECE WHILE FLOWING AN ELECTROLYTE BETWEEN THE WORKPIECE AND DIE AND AT THE SAME TIME CAUSING A SUBSTANTIALLY CONSTANT CURRENT TO FLOW THROUGH SAID ELECTROLYTE BETWEEN SAID WORKPIECE AND DIE, AND CONTINUING SAID HELICAL MOTION UNTIL THE SAID ONE END OF SAID DIE IS ADJACENT THE OTHER END OF THE SURFACE TO BE THREADED.
Claim 2
Independent Claim
221 words
THE METHOD OF MAKING A STRAIGHT THREAD ON A WORKPIECE COMPRISING PROVIDING A WORKPIECE HAVING A CYLINDRICAL SURFACE TO BE THREADED, PROVIDING A NON-ERODIBLE CATHODE DIE HAVING A HELICAL THREAD THEREON, THE THREADED PORTIN OF SAID DIE BEING ARRANGED ON A TAPER WITH THE DIAMETER OF THE CREST OF THE THREADAT ONE END VARYING SLIGHTLY FROM THE ROOT DIAMETER OF THE THREAD TO BE FORMED AND THE DIAMETER OF THE CREST OF THE THREAD AT THE OTHER END VARYING SLIGHTLY FROM THE CREST DIAMETER OF THE THREAD TO BE FORMED, COATING ALL BUT THE CREST OF THE DIE THREADS WITH AN INSULATING MATERIAL, SUPPORTING THE DIE IN AXIAL ALIGNMENT WITH THE WORKPIECE WITH SAID OTHER END OF THE DIE ADJACENT ONE END OF THE CYLINDRICAL SURFACE OF THE WORKPIECE TO BE THREADED, THE END OF THE DIE ADJACENT THE WORKPIECE HAVING THE DIAMETER OF THE CREST OF THE THREAD VARYING ONLY SLIGHTLY FROM THE DIAMETER OF THE CYLINDRICAL SURFACE, THEN CAUSING HELICAL MOTION BETWEEN SAID DIE AND WORKPIECE WHILE FLOWING AN ELECTROLYTE BETWEEN THE WORKPIECE AND DIE AND AT THE SAME TIME CAUSING A SUBSTANTIALLY CONSTANT CURRENT TO FLOW THROUGH SAID ELECTROLYTE BETWEEN SAID WORKPIECE AND DIE, AND CONTINUING SAID HELICAL MOTION UNTIL THE SAID ONE END OF SAID DIE IS ADJACENT THE OTHER END OF THE SURFACE TO BE THREADED.
References Cited (Backward Citations)
US2526423A
Cited
GB661273A
Cited
US2650979A
Cited
US2739935A
Cited
GB789293A
Cited
US2798846A
Cited
US2868705A
Cited
US2773968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |