US4866212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low dielectric constant reinforced coaxial electric cable
Assignee: W.L. Gore and Associates Inc
•
Filing: 1988-03-24
•
Granted: 1989-09-12
•
Expires: 2008-03-24
Abstract
Abstract A reinforced coaxial electric cable having low dielectric constant and a layer of convoluted dielectric insulation placed between either center conductor and conductive shield, optional porous dielectric and shield, or shield and jacket. FEP convoluted dielectric and expanded polytetrafluoroethylene insulation.
Inventors
- 👤 Glenn B. Ingram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:08
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/18; H01B11/1834; H01B11/1843; H01B11/1839; H01B11/1878
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
53 words
A reinforced coaxial electric cable having low dielectric constant comprising: (a) a conductive metal center conductor; (b) surrounding said center conductor, spaced therefrom, and insulated therefrom an electrically conductive metal shield; (c) a layer of convoluted electric insulation surrounding said center conductor; and (d) a layer of expanded polytetrafluoroethylene surrounding said center conductor.
Claim 2
Dependent Claim
53 words
A reinforced coaxial electric cable having low dielectric constant comprising: (a) a conductive metal center conductor; (b) surrounding said center conductor, spaced therefrom, and insulated therefrom an electrically conductive metal shield; (c) a layer of convoluted electric insulation surrounding said center conductor; and (d) a layer of expanded polytetrafluoroethylene surrounding said center conductor.
Claim 3
Dependent Claim
13 words
A cable of claim 1, wherein said convoluted insulation lies outside said shield.
Claim 4
Dependent Claim
25 words
A cable of claim 1, wherein said convoluted insulation lies outside the layer of expanded polytetrafluoroethylene insulation surrounding said center conductor and inside said shield.
Claim 5
Dependent Claim
25 words
A cable of claim 1, wherein said convoluted insulation lies inside the layer of expanded polytetrafluoroethylene insulation surrounding said center conductor and inside said shield.
Claim 6
Dependent Claim
32 words
A cable of claim 1, wherein a layer of expanded polytetrafluoroethylene insulation lies both inside and outside said layer of convoluted insulation and both said expanded polytetrafluoroethylene layers lie inside said shield.
Claim 7
Dependent Claim
13 words
A cable of claim 1, wherein said convoluted insulation is spiralled and thermoplastic.
Claim 8
Dependent Claim
14 words
A cable of claim 6, wherein said convoluted insulation is fluorinated ethylene-propylene copolymer (FEP).
References Cited (Backward Citations)
US20244A
Cited
USRE20244E
Cited
DE485946C
Cited
US2197616A
Cited
US2348752A
Cited
US3287490A
Cited
US3227800A
Cited
US3745232A
Cited
US4408089A
Cited
US4332976A
Cited
US4560829A
Cited
US4626810A
Cited
US4758685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |