Patent US3383890A successfully refreshed from Google Patents.
US3383890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil assembly for magnetic forming apparatus
Assignee: General Dynamics Corp
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Filing: 1966-02-23
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Granted: 1968-05-21
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Expires: 1986-02-23
Abstract
No abstract record available.
Inventors
- 👤 Wildi Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:22
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A COIL ASSEMBLY FOR USE IN A MAGNETIC FORMING APPARATUS, COMPRISING A FIELD SHAPER DEFINING AT LEAST ONE OPENING FOR RECEIVING A PIECE TO BE FORMED, SAID FIELD SHAPER BEING OF SUBSTANTIALLY GREATER DIMENSIONS IN DIRECTIONS NORMAL TO THE AXIS OF SAID OPENING THAN IN THE DIRECTION PARALLEL THERETO, AND HAVING AT LEAST ONE SURFACE WHICH EXTENDS GENERALLY PERPENDICULAR TO THE AXIS OF SAID OPENING, AN INSULATING SHEET HAVING ONE SURFACE THERETO DISPOSED IMMEDIATELY ADJACENT SAID SURFACE OF SAID FIELD SHAPER, A CONDUCTIVE COIL HAVING A TURN WHICH IS OF A
Claim 2
Dependent Claim
91 words
A COIL ASSEMBLY FOR USE IN A MAGNETIC FORMING APPARATUS, COMPRISING A FIELD SHAPER DEFINING AT LEAST ONE OPENING FOR RECEIVING A PIECE TO BE FORMED, SAID FIELD SHAPER BEING OF SUBSTANTIALLY GREATER DIMENSIONS IN DIRECTIONS NORMAL TO THE AXIS OF SAID OPENING THAN IN THE DIRECTION PARALLEL THERETO, AND HAVING AT LEAST ONE SURFACE WHICH EXTENDS GENERALLY PERPENDICULAR TO THE AXIS OF SAID OPENING, AN INSULATING SHEET HAVING ONE SURFACE THERETO DISPOSED IMMEDIATELY ADJACENT SAID SURFACE OF SAID FIELD SHAPER, A CONDUCTIVE COIL HAVING A TURN WHICH IS OF A
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) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |