US4050073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support for foam absorber of electromagnetic waves
Assignee: Individual
•
Filing: 1976-01-14
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Granted: 1977-09-20
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Expires: 1996-01-14
Abstract
Abstract Support for foam absorber for electromagnetic waves. The support is constituted by one or more filaments impregnated with a plastic material which may be either thermohardening or thermoplastic. The support has a generally pyramidal form. The plastic material employed for the impregnation of the wound filaments has a dielectric constant less than six.
Inventors
- 👤 Ludwig Wesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:25
CPC Classifications
H; H01; H01Q; H01Q17/00; H01Q17/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
90 words
In a foam-type absorber of electromagnetic waves, a reinforcing framework comprising, in combination, a plurality of elongated outer support elements disposed in spaced relation and oriented to define the longitudinal edges of a pyramid, and a heat-hardenable strand wound in reentrant roving fashion about the support elements to define, between each adjacent pair of the support elements, a lattice-shaped lateral wall having a plurality of substantially diamond-shaped apertures therein, the lattice-shaped wall and the support elements cooperating to define a chamber, and foam-type electromagnetic absorbing means supported within the chamber.
Claim 2
Dependent Claim
90 words
In a foam-type absorber of electromagnetic waves, a reinforcing framework comprising, in combination, a plurality of elongated outer support elements disposed in spaced relation and oriented to define the longitudinal edges of a pyramid, and a heat-hardenable strand wound in reentrant roving fashion about the support elements to define, between each adjacent pair of the support elements, a lattice-shaped lateral wall having a plurality of substantially diamond-shaped apertures therein, the lattice-shaped wall and the support elements cooperating to define a chamber, and foam-type electromagnetic absorbing means supported within the chamber.
Claim 3
Dependent Claim
26 words
An absorber according to claim 1, wherein the strand comprises at least one filament impregnated with a plastic material having a dielectric constant less than 6.
Claim 4
Dependent Claim
17 words
An absorber according to claim 1, wherein each elongated support element presents discontinuities upon its outer surfaces.
Claim 5
Dependent Claim
23 words
An absorber according to claim 1, wherein each elongated support element presents on at least its outer sides a plurality of spaced peaks.
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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |