Patent US3345844A successfully refreshed from Google Patents.
US3345844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil for magnetic forming
Assignee: General Dynamics Corp
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Filing: 1965-02-02
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Granted: 1967-10-10
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Expires: 1985-02-02
Abstract
No abstract record available.
Inventors
- 👤 Jansen Hansjorg
- 👤 Wildi Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:45
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A COIL ASSEMBLY FOR USE IN AN ELECTROMAGNETIC FORMING APPARATUS, SAID COIL ASSEMBLY COMPRISING A DISCONTINUOUS COIL BODY FORMED OF A CONDUCTIVE MATERIAL AND HAVING AN OPENING OF SUFFICIENT SIZE TO ACCOMMODATE A WORKPIECE TO BE FORMED, SAID COIL BODY INCLUDING AN INTERNAL BORE OF ESSENTIALLY FLAT SPIRAL CONFIGURATION COMMENCING ADJACENT A SURFACE OF SAID OPENING AND TERMINATING ADJACENT AN EDGE OF THE BODY, AN ELONGATED CONDUCTOR DISPOSED WITHIN SAID BORE OF SAID COIL BODY AND EXTENDING BETWEEN THE ENDS THEREOF, AND MEANS INSULATING THE CONDUCTOR FROM SAID COIL BODY.
Claim 2
Dependent Claim
90 words
A COIL ASSEMBLY FOR USE IN AN ELECTROMAGNETIC FORMING APPARATUS, SAID COIL ASSEMBLY COMPRISING A DISCONTINUOUS COIL BODY FORMED OF A CONDUCTIVE MATERIAL AND HAVING AN OPENING OF SUFFICIENT SIZE TO ACCOMMODATE A WORKPIECE TO BE FORMED, SAID COIL BODY INCLUDING AN INTERNAL BORE OF ESSENTIALLY FLAT SPIRAL CONFIGURATION COMMENCING ADJACENT A SURFACE OF SAID OPENING AND TERMINATING ADJACENT AN EDGE OF THE BODY, AN ELONGATED CONDUCTOR DISPOSED WITHIN SAID BORE OF SAID COIL BODY AND EXTENDING BETWEEN THE ENDS THEREOF, AND MEANS INSULATING THE CONDUCTOR FROM SAID COIL BODY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |