US3123699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heated circular
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
•
Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:41
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/86; B29C48/03; B29C48/09; B29C48/10; B29C48/30; B29C48/32; B29C48/33; B29C48/865
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
A CIRCUMFERENTIAL FILM DIE COMPRISING A DIE BODY, MEANS IN SAID BODY FORMING AN ANNULAR EXTRUSION ORIFICE, SAID BODY HAVING AN UPPER GENERALLY CIRCULAR SURFACE ADAPTED FOR THE APPLICATION OF HEATING FLUX THERETO, A CIRCUMFERENTIAL ELECTRIC INDUCTION HEATING COIL HAVING A DIAMETER LESS THAN THAT OF SAID SURFACE, MEANS SUPPORTING SAID COIL WHOLLY ON ONE SIDE OF SAID BODY IN SPACED RELATION TO AND GENERALLY CENTERED OVER SAID SURFACE, AND A PLURALITY OF GENERALLY U-SHAPED FLUX GUIDES ANGULARLY DISTRIBUTED ABOUT SAID DIE BODY SURFACE HAVING LONGITUDINALLY EXTENDING BODIES POSITIONED OVER SAID COIL AND INWARDLY TURNED LEGS ON OPPOSITE SIDES OF SAID COIL IN INTIMATE CONTACT WITH SAID SURFACE, AND INSULATING SHIMS BETWEEN SAID GUIDE BODIES AND SAID COIL TO ISOLATE SAID COIL FROM DIRECT CONTACT WITH SAID FLUX GUIDES.
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) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |