US3217530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Die blocks for thread rolling machines
Assignee: Katayama Rivet & Screw Ind Co
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Filing: 1963-01-02
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Granted: 1965-11-16
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Expires: 1983-01-02
Abstract
No abstract record available.
Inventors
- 👤 Sato Teiji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:37
CPC Classifications
B; B21; B21H; B21H3/00; B21H3/02; B21H3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A PAIR OF DIE BLOCKS FOR ROLLING SCREW THREADS IN AND POINTING AND FINISHING A HEADED SCREW BLANK, EACH DIE BLOCK HAVING A WORKING FACE WITH A PLURALITY OF OBLIQUELY EXTENDING THREAD FORMING GROOVES AND RIBS, AND A RIDGE GRADUALLY RISING OUT OF THE WORKING FACE OF SAID DIE BLOCK BEGINNING AT A POINT SPACED A SHORT DISTANCE IN FROM ONE END OF SAID DIE BLOCK AND EXTENDING OBLIQUELY TOWARD ONE EDGE OF SAID DIE BLOCK AND THEN SUBSTANTIALLY PARALLEL TO SAID ONE EDGE OF SAID DIE BLOCK, SAID THREAD FORMING GROOVES AND RIBS EXTENDING UP THE FACE OF THE RIDGE FACING THE OTHER EDGE OF SAID DIE BLOCK, AND SAID DIE BLOCK HAVING A RECESS THEREIN EXTENDING BACK INTO THE WORKING FACE THEREOF FROM SAID EDGE BEGINNING AT A POINT SPACED FROM SAID ONE END OF SAID DIE BLOCK, THE UNGROOVED FACE OF SAID RIDGE EXTENDING INTO SAID RECESS.
Claim 2
Dependent Claim
150 words
A PAIR OF DIE BLOCKS FOR ROLLING SCREW THREADS IN AND POINTING AND FINISHING A HEADED SCREW BLANK, EACH DIE BLOCK HAVING A WORKING FACE WITH A PLURALITY OF OBLIQUELY EXTENDING THREAD FORMING GROOVES AND RIBS, AND A RIDGE GRADUALLY RISING OUT OF THE WORKING FACE OF SAID DIE BLOCK BEGINNING AT A POINT SPACED A SHORT DISTANCE IN FROM ONE END OF SAID DIE BLOCK AND EXTENDING OBLIQUELY TOWARD ONE EDGE OF SAID DIE BLOCK AND THEN SUBSTANTIALLY PARALLEL TO SAID ONE EDGE OF SAID DIE BLOCK, SAID THREAD FORMING GROOVES AND RIBS EXTENDING UP THE FACE OF THE RIDGE FACING THE OTHER EDGE OF SAID DIE BLOCK, AND SAID DIE BLOCK HAVING A RECESS THEREIN EXTENDING BACK INTO THE WORKING FACE THEREOF FROM SAID EDGE BEGINNING AT A POINT SPACED FROM SAID ONE END OF SAID DIE BLOCK, THE UNGROOVED FACE OF SAID RIDGE EXTENDING INTO SAID RECESS.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |