US3292243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of metal coils
Assignee: Rio Tinto Switzerland AG
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Filing: 1963-08-06
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Granted: 1966-12-20
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Expires: 1983-08-06
Abstract
No abstract record available.
Inventors
- 👤 Hofling Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:22
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/12; C; C23; C23F; C23F1/00; C23F1/02; C23F15/00; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/06; C25D11/08; H01B; H01B3/00; H01B3/02; H01B3/10; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD OF PRODUCING METAL COILS, WHICH COMPRISES WINDING METAL FOIL WITH A LAYER OF INSULATING MATERIAL THEREON UNDER A DECREASING TENSION, THE MEAN TENSION BEING MORE THAN 50% OF THE TENSILE STRENGTH OF THE FOIL, TO PRODUCE THEREBY A COIL COMPRISING LAYERS OF METAL FOIL SEPARATED BY INSULATING MATERIAL BUT HAVING EXPOSED SIDE EDGES, WHICH MAY BE IN CONTACT WITH THE ANOTHER, AND IMMERSING THE SIDES FACES OF THE FOIL IN A CHEMICAL REACTING LIQUID HAVING THE EFFECT OF CAUSING ADJACENT SIDE EDGES OF THE FOIL TO BECOME INSULATED FROM ONE ANOTHER.
Claim 2
Independent Claim
93 words
A METHOD OF PRODUCING METAL COILS, WHICH COMPRISES WINDING METAL FOIL WITH A LAYER OF INSULATING MATERIAL THEREON UNDER A DECREASING TENSION, THE MEAN TENSION BEING MORE THAN 50% OF THE TENSILE STRENGTH OF THE FOIL, TO PRODUCE THEREBY A COIL COMPRISING LAYERS OF METAL FOIL SEPARATED BY INSULATING MATERIAL BUT HAVING EXPOSED SIDE EDGES, WHICH MAY BE IN CONTACT WITH THE ANOTHER, AND IMMERSING THE SIDES FACES OF THE FOIL IN A CHEMICAL REACTING LIQUID HAVING THE EFFECT OF CAUSING ADJACENT SIDE EDGES OF THE FOIL TO BECOME INSULATED FROM ONE ANOTHER.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |