Patent US4675690A successfully refreshed from Google Patents.
US4675690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conical spiral antenna
Assignee: Revlon Consumer Products LLC
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Filing: 1984-05-25
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Granted: 1987-06-23
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Expires: 2004-05-25
Abstract
Abstract A photoresist-type chemical etching process is used to define a computer-generated flat pattern of conductors as if a complex conical spiral had been cut apart along a straight line through the apex and laid flat. The substrate in the shape of a circular sector is bent into a cone and the radial edges are joined in a seam. The split turns of the spiral are electrically interconnected across the seam.
Inventors
- 👤 Robert W. Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:10
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/08; H01Q11/083; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0393; H05K1/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
144 words
A conical spiral antenna, comprising a cone having a seam along a line which would include the apex, formed by joining the radial edges of a flat flexible substrate in the shape, when flat, of a circular sector carrying a plurality of spaced conductive segments in the pattern of a conical, ribbon-like spiral cut apart along a single straight line through the apex and laid flat, means for joining said edges to form a fixed seam, and means for electrically interconnecting mating portions of split turns of said spiral across said seam, including a flexible insulating sheet having one face bearing electrically conductive material bonded to said cone over said seam, said sheet being in the form of an integral elongated strip extending substantially the entire length of said seam and having said conductive material located only in areas corresponding to a subjacent turn.
Claim 2
Dependent Claim
144 words
A conical spiral antenna, comprising a cone having a seam along a line which would include the apex, formed by joining the radial edges of a flat flexible substrate in the shape, when flat, of a circular sector carrying a plurality of spaced conductive segments in the pattern of a conical, ribbon-like spiral cut apart along a single straight line through the apex and laid flat, means for joining said edges to form a fixed seam, and means for electrically interconnecting mating portions of split turns of said spiral across said seam, including a flexible insulating sheet having one face bearing electrically conductive material bonded to said cone over said seam, said sheet being in the form of an integral elongated strip extending substantially the entire length of said seam and having said conductive material located only in areas corresponding to a subjacent turn.
Claim 3
Dependent Claim
126 words
A conical spiral antenna, comprising a cone having a seam along a line which would include the apex, formed by joining the radial edges of a flat flexible substrate in the shape, when flat, of a circular sector carrying a plurality of spaced conductive segments in the pattern of a conical, ribbon-like spiral cut apart along a single straight line through the apex and laid flat, means for joining said edges to form a fixed seam, and means for electrically interconnecting mating portions of split turns of said spiral across said seam, including a flexible insulating sheet having one face bearing electrically conductive material bonded to said cone over said seam, said sheet being in the form of an elongated strip substantially coextensive with said seam.
Claim 4
Dependent Claim
126 words
A conical spiral antenna, comprising a cone having a seam along a line which would include the apex, formed by joining the radial edges of a flat flexible substrate in the shape, when flat, of a circular sector carrying a plurality of spaced conductive segments in the pattern of a conical, ribbon-like spiral cut apart along a single straight line through the apex and laid flat, means for joining said edges to form a fixed seam, and means for electrically interconnecting mating portions of split turns of said spiral across said seam, including a flexible insulating sheet having one face bearing electrically conductive material bonded to said cone over said seam, said sheet being in the form of an elongated strip substantially coextensive with said seam.
Claim 5
Dependent Claim
57 words
The antenna of claim 2, wherein said electrically conductive material is arranged on said one face of said strip in the form of a plurality of spaced insulated parallel lines several per conductor junction, transverse to the length of the strip, whereby registration of the lines on the strip with the conductors on the substrate is unnecessary.
References Cited (Backward Citations)
US3034121A
Cited
US3246245A
Cited
US3564553A
Cited
GB1198410A
Cited
US3573840A
Cited
US3618114A
Cited
US3649394A
Cited
US3681772A
Cited
US3907565A
Cited
US4204212A
Cited
US4243993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |