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US4030892A
Expired / Lapsed
US
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Flexible electromagnetic shield comprising interlaced glassy alloy filaments
Assignee: Honeywell International Inc
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Filing: 1976-03-02
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Granted: 1977-06-21
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Expires: 1996-03-02
Abstract
Abstract A flexible electromagnetic shield is provided. The shield comprises interlaced filaments of at least one glassy metal alloy. The glassy alloy has a maximum permeability of at least about 50,000 and a coercivity of less than about 0.08 Oe.
Inventors
- 👤 Lewis Isaac Mendelsohn
- 👤 Ethan Allen Nesbitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:45
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/009; C; C22; C22C; C22C45/00; C22C45/008; G; G12; G12B; G12B17/00; G12B17/02; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/928; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T442/00; Y10T442/30; Y10T442/3033; Y10T442/3041; Y10T442/3382; Y10T442/40; Y10T442/406; Y10T442/475
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
100 words
A flexible electromagnetic shield which comprises interlaced filaments, said filaments comprising at least one metal alloy that is at least 50% glassy, said metal alloy having the composition M a X b where M is at least one element selected from the group consisting of iron and cobalt, X is at least one element selected from the group consisting of boron, carbon and phosphorus, "a" ranges from about 75 to 85 atom percent, "b" ranges from about 15 to 25 atom percent, and a maximum permeability of at least about 50,000 and a coercivity of less than about 0.08 Oe.
Claim 2
Dependent Claim
100 words
A flexible electromagnetic shield which comprises interlaced filaments, said filaments comprising at least one metal alloy that is at least 50% glassy, said metal alloy having the composition M a X b where M is at least one element selected from the group consisting of iron and cobalt, X is at least one element selected from the group consisting of boron, carbon and phosphorus, "a" ranges from about 75 to 85 atom percent, "b" ranges from about 15 to 25 atom percent, and a maximum permeability of at least about 50,000 and a coercivity of less than about 0.08 Oe.
Claim 3
Dependent Claim
18 words
The flexible electromagnetic shield of claim 1 in which the metal alloy is at least about 90% glassy.
Claim 4
Dependent Claim
24 words
The flexible electromagnetic shield of claim 1 having maximum permeability of at least about 100,000 and a coercivity of less than about 0.04 Oe.
Claim 5
Dependent Claim
19 words
The flexible electromagnetic shield of claim 1 in which up to about one-half of M is replaced by nickel.
Claim 6
Dependent Claim
40 words
The flexible electromagnetic shield of claim 1 in which up to about 10 atom percent of iron and/or cobalt is replaced by at least one element selected from the group consisting of chromium, copper, manganese, molybdenum, niobium, tantalum and tungsten.
Claim 7
Dependent Claim
25 words
The flexible electromagnetic shield of claim 4 in which the glassy metal alloy has the composition Fe 40 Ni 40 P 14 B 6 .
Claim 8
Dependent Claim
21 words
The flexible electromagnetic shield of claim 1 in which the glassy metal alloy has the composition Fe 80 B 20 .
Claim 9
Dependent Claim
23 words
The flexible electromagnetic shield of claim 1 in which the glassy metal alloy has the composition Co 74 Fe 6 B 20 .
Claim 10
Dependent Claim
25 words
The flexible electromagnetic shield of claim 1 in which the glassy metal alloy has the composition Fe 71 Mo 9 C 18 B 2 .
Claim 11
Dependent Claim
29 words
The flexible electromagnetic shield according to claim 6 annealed at about 325° C for 2 hrs at 10 Oe in a partial vacuum of less than about 1000 μm.
Claim 12
Dependent Claim
29 words
The flexible electromagnetic shield according to claim 7 annealed at about 325° C for 3 hrs at 10 Oe in a partial vacuum of less than about 1000 μm.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |