US3229024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene filled cable
Assignee: Ericsson Inc
•
Filing: 1962-12-21
•
Granted: 1966-01-11
•
Expires: 1982-12-21
Abstract
No abstract record available.
Inventors
- 👤 Bun P Kang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:12
CPC Classifications
H; H01; H01B; H01B9/00; H01B9/06; H01B9/0611; H01B7/00; H01B7/02; H01B9/0627
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
A HIGH-VOLTAGE ELECTRIC POWER CABLE COMPRISING: (A) AN ELONGATED METAL CONDUCTOR, (B) A WALL OF INSULATION SURROUNDING SAID CONDUCTOR, (A) SAID INSULATION BEING COMPRISED OF A PLURALITY OF LAYERS OF CRYSTALLINE POLYPROPYLENE INSUALTING TAPE, (B) HAVING SPACINGS THEREBETWEEN, AND (C) LIQUID POLYPROPYLENE (A) COATING THE SURFACES OF SAID LAYERS AND (B) FILLING SAID SPACINGS, (C) SAID LIQUID POLYPROPYLENE HAVING A VISCOSITY AT THE OPERATING TEMPERATURE OF SAID CABLE SUFFICIENT TO PREVENT FLOWING FROM SAID SPACINGS.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |