US3149218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making dies and rolls
Assignee: Individual
•
Filing: 1962-04-30
•
Granted: 1964-09-15
•
Expires: 1982-04-30
Abstract
No abstract record available.
Inventors
- 👤 Michael J Celovsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:07
CPC Classifications
B; B23; B23H; B23H1/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49679; Y10T29/49689; Y10T29/49995; Y10T82/00; Y10T82/17; Y10T82/25; Y10T82/2524
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
A METHOD OF FORMING A METAL FORMING ROLL WHICH COMPRISES FORMING A CYLINDRICAL ROLL BLANK, MACHINING AN OUTSIDE SURFACE OF THE ROLLS AND FACING THE ENDS OF THE ROLL PROVIDING END FACES, BORING A BORE THROUGH THE ROLL, MILLING A KEYWAY IN THE BORE, HEAT TREATING THE ROLL, GRINDING THE INSIDE AND OUTSIDE SURFACES AND THE END FACES OF THE ROLL, AND TURNING THE ROLL WHILE UPWARDLY MOVING A TAPERED ELECTRODE TANGENTIALLY OF THE ROLL AND ELECTRIC SPARK BURNING A TAPERED GROOVE IN THE ROLL WHILE THE CUTTING ZONE IS IMMERSED IN OIL TO PERMIT THUS MACHINED PARTICLES TO FALL AWAY FROM THE CUTTING ZONE TO MINIMIZE SHORT CIRCUITS.
References Cited (Backward Citations)
US832304A
Cited
US1395607A
Cited
US1555771A
Cited
US1947462A
Cited
US2739935A
Cited
US2813966A
Cited
US2773968A
Cited
US3042789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |