US3297818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral insulated electric cables
Assignee: Balfour Beatty PLC
•
Filing: 1965-05-07
•
Granted: 1967-01-10
•
Expires: 1985-05-07
Abstract
No abstract record available.
Inventors
- 👤 Mccleery James Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:37
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A MINERAL INSULATED CABLE HAVING AT LEAST ONE CONDUCTOR SEPARATED FROM A METALLIC SHEATH BY COMPACTED MINERAL INSULATION IN WHICH THE SHEATH IS OF A METAL WHICH AT HIGH TEMPERATURES PROMOTES CONDUCTOR EMBRITTLEMENT AND IS LINED WITH A METAL SELECTED FROM THE GROUP CONSISTING OF MILD STEEL AND AN ALLOY CONTAINING AS ESSENTIAL INGREDIENTS: NOT LESS THAN 72% OF NICKEL, 14-17% OF CHROMIUM, AND 6-10% OF IRON.
Claim 2
Dependent Claim
67 words
A MINERAL INSULATED CABLE HAVING AT LEAST ONE CONDUCTOR SEPARATED FROM A METALLIC SHEATH BY COMPACTED MINERAL INSULATION IN WHICH THE SHEATH IS OF A METAL WHICH AT HIGH TEMPERATURES PROMOTES CONDUCTOR EMBRITTLEMENT AND IS LINED WITH A METAL SELECTED FROM THE GROUP CONSISTING OF MILD STEEL AND AN ALLOY CONTAINING AS ESSENTIAL INGREDIENTS: NOT LESS THAN 72% OF NICKEL, 14-17% OF CHROMIUM, AND 6-10% OF IRON.
References Cited (Backward Citations)
GB190807910A
Cited
US3205296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |