US3393547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal forming method and apparatus
Assignee: Intercole Bolling Corp
•
Filing: 1966-07-22
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Granted: 1968-07-23
•
Expires: 1986-07-22
Abstract
No abstract record available.
Inventors
- 👤 William A Kortan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:21
CPC Classifications
B; B21; B21D; B21D5/00; B21D5/06; B21D5/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A METHOD OF FORMING AN ELONGATED ELEMENT HAVING SUBSTANTIAL NOTCHES IN ONE EDGE COMPRISING THE STEPS OF PLACING APERTURES IN A STRIP, SUCH APERTURES HAVING TWOFOLD SYMMETRY AND BEING THE CONFIGURATION OF SUCH NOTCHES WHEN DIVIDED LONGITUDINALLY THROUGH THE POINT OF SYMMETRY, ROLL FORMING SUCH STRIP, AND LONGITUDINALLY SLITTING SUCH STRIP THROUGH THE POINTS OF SYMMETRY OF SUCH APERTURES TO FORM SAID ELEMENT.
Claim 2
Independent Claim
63 words
A METHOD OF FORMING AN ELONGATED ELEMENT HAVING SUBSTANTIAL NOTCHES IN ONE EDGE COMPRISING THE STEPS OF PLACING APERTURES IN A STRIP, SUCH APERTURES HAVING TWOFOLD SYMMETRY AND BEING THE CONFIGURATION OF SUCH NOTCHES WHEN DIVIDED LONGITUDINALLY THROUGH THE POINT OF SYMMETRY, ROLL FORMING SUCH STRIP, AND LONGITUDINALLY SLITTING SUCH STRIP THROUGH THE POINTS OF SYMMETRY OF SUCH APERTURES TO FORM SAID ELEMENT.
References Cited (Backward Citations)
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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) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |