Patent US3102502A successfully refreshed from Google Patents.
US3102502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw operated expander
Assignee: Taylor Winfield Corp
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Filing: 1959-01-21
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Granted: 1963-09-03
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Expires: 1979-01-21
Abstract
No abstract record available.
Inventors
- 👤 Melvin M Seeloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:27
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/08; B21D39/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
APPARATUS FOR FORMING A CYLINDRICAL METALLIC SHAPE COMPRISING AN OUTER DIE SET HAVING A PLURALITY OF SEGMENTAL DIE UNITS FOR ENGAGING THE OUTER SURFACE OF THE WORKPIECE, POWER MEANS TO MOVE SAID SEGMENTAL DIE UNITS RADIALLY INWARD AND OUTWARD TOWARD AND AWAY FROM EACH OTHER TO PERMIT ENTRY AND REMOVAL OF THE WORKPIECE, AN EXPANDING DIE CONCENTRICALLY WITHIN SAID OUTER DIE SET, EACH OF SAID DIE UNITS HAVING ON ITS INNER OR WORKING FACE A VERTICALLY DISPOSED SLOT, A VERTICALLY DISPOSED BAR MOUNTED ON EACH OF SAID UNITS FOR RADIAL MOVEMENT INTO AND OUT OF THE SLOT, AND MEANS TO RESILIENTLY URGE SAID BARS TO PREDETERMINED
Claim 2
Dependent Claim
106 words
APPARATUS FOR FORMING A CYLINDRICAL METALLIC SHAPE COMPRISING AN OUTER DIE SET HAVING A PLURALITY OF SEGMENTAL DIE UNITS FOR ENGAGING THE OUTER SURFACE OF THE WORKPIECE, POWER MEANS TO MOVE SAID SEGMENTAL DIE UNITS RADIALLY INWARD AND OUTWARD TOWARD AND AWAY FROM EACH OTHER TO PERMIT ENTRY AND REMOVAL OF THE WORKPIECE, AN EXPANDING DIE CONCENTRICALLY WITHIN SAID OUTER DIE SET, EACH OF SAID DIE UNITS HAVING ON ITS INNER OR WORKING FACE A VERTICALLY DISPOSED SLOT, A VERTICALLY DISPOSED BAR MOUNTED ON EACH OF SAID UNITS FOR RADIAL MOVEMENT INTO AND OUT OF THE SLOT, AND MEANS TO RESILIENTLY URGE SAID BARS TO PREDETERMINED
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |