US5042386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Destructive device for metal oxide-semiconductors
Assignee: United States Department of the Navy
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Filing: 1974-09-27
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Granted: 1991-08-27
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Expires: 1994-09-27
Abstract
Abstract A pyrotechnic composition containing from 55 to 65 percent by weight Fe.s2 O 3 powder, 15 to 25 percent by weight aluminum powder, 5 to 15 percent by weight Ba(NO 3 ) 2 , 2 to 3 percent by weight MoS 2 and 5 to 10 percent by weight Viton A (a copolymer of vinylidene fluoride and hexafluoropropylene) is disclosed as being useful in the destruction of metal oxide-semiconductor chips.
Inventors
- 👤 Howard W. Kruse
- 👤 Richard A. Breitengross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:40
CPC Classifications
H; H10; H10W; H10W42/00; C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06C; C06C9/00; H01; H01H; H01H39/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
52 words
A pyrotechnic composition consisting essentially of from 55 to 65 weight percent ferric oxide, from 15 to 25 weight percent aluminum, from 5 to 15 weight percent barium nitrate, from 2 to 3 weight percent molybdenum disulfide and from 5 to 10 weight percent of a copolymer of vinylidene fluoride and hexafluoropropylene.
Claim 2
Dependent Claim
52 words
A pyrotechnic composition consisting essentially of from 55 to 65 weight percent ferric oxide, from 15 to 25 weight percent aluminum, from 5 to 15 weight percent barium nitrate, from 2 to 3 weight percent molybdenum disulfide and from 5 to 10 weight percent of a copolymer of vinylidene fluoride and hexafluoropropylene.
Claim 3
Independent Claim
77 words
A method for destroying electronic circuitry on a metal oxide-semiconductor (MOS) chip comprising the steps of: (a) mounting a pellet consisting essentially of 55 to 65 weight percent ferric oxide, 15 to 25 weight percent aluminum, 5 to 15 weight percent barium nitrate, 2 to 3 weight percent molybdenum disulfide and from 5 to 10 weight percent of a copolymer of vinylidene fluoride and hexafluoropropylene a suitable distance away from said chip; and (b) igniting said pellet.
Claim 4
Independent Claim
77 words
A method for destroying electronic circuitry on a metal oxide-semiconductor (MOS) chip comprising the steps of: (a) mounting a pellet consisting essentially of 55 to 65 weight percent ferric oxide, 15 to 25 weight percent aluminum, 5 to 15 weight percent barium nitrate, 2 to 3 weight percent molybdenum disulfide and from 5 to 10 weight percent of a copolymer of vinylidene fluoride and hexafluoropropylene a suitable distance away from said chip; and (b) igniting said pellet.
Claim 5
Dependent Claim
87 words
A method according to claim 2 wherein said pellet is coated on one face with an ignition mix prepared by mixing about 2 parts by weight of a composition prepared by mixing about 60 weight percent magnesium (3-5μ particle size) with about 40 percent of a copolymer of vinylidene fluoride and hexafluoropropylene dissolved in acetone with about 7 parts by weight of a mixture containing equal parts of aluminum and plaster of paris and said ignition mix is utilized to assist in the ignition of said pellet.
References Cited (Backward Citations)
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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) | 1994-08-26 | 1995-02-25 | 1995-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-26 | 1999-02-25 | 1999-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-26 | 2003-02-25 | 2003-08-27 | $7700.00 | Window Closed / Lapsed |