US3725671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrotechnic eradication of microcircuits
Assignee: United States Department of the Navy
•
Filing: 1970-11-02
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Granted: 1973-04-03
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Expires: 1990-11-02
Abstract
Abstract An anticompromise pyrotechnic eradication thin film circuit module having thin films of perfluoropolymer and metal thereon in sufficient quantity to produce a pyrotechnic reaction to cause heat of fusion of the metals of the thin film circuit to destroy the circuit beyond recognition and repair.
Inventors
- 👤 F Keister
- 👤 J Rust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:25
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/073; G06K19/07309; G06K19/07372; G06K19/07381; C; C06; C06B; C06B27/00; C06B43/00; F; F41; F41H; F41H13/00; H; H05; H05K; H05K1/00; H05K1/02; H05K1/0286; H05K1/0293; H10; H10D; H10D89/00; H10W; H10W42/00; H10W42/40; H05K1/0275; H05K2201/00; H05K2201/03; H05K2201/0302; H05K2201/0317; H05K2203/00; H05K2203/11; H05K2203/1163; H05K2203/17; H05K2203/175; H10W70/00; H10W70/60; H10W70/67; H10W70/68; H10W70/682; H10W72/00; H10W72/851; H10W72/874; H10W72/884; H10W90/00; H10W90/701; H10W90/731; H10W90/734; H10W90/751; H10W90/754; Y; Y10; Y10S; Y10S257/00; Y10S257/922
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
42 words
A pyrotechnic eradication means as set forth in claim 1 wherein said pyrotechnic material coating said microcircuit film operates as a bonding agent between said microcircuit substrate and said microcircuit film, said perfluoropolymer material having electrical insulating qualities for said microcircuit film.
Claim 2
Dependent Claim
27 words
A pyrotechnic eradication means as set forth in claim 1 wherein said pyrotechnic materials coating overlies said microcircuit film, said perfluoropolymer operating as an electrical insulating material.
Claim 3
Dependent Claim
53 words
A pyrotechnic eradication means as set forth in claim 1 wherein said pyrotechnic material of perfluoropolymers and powdered metAls are from the group mixtures consisting of lithium fluoride, sodium fluoride, potassium fluoride, beryllium fluoride, magnesium fluoride, calcium fluoride, boron fluoride, aluminum fluoride, scandium fluoride, yttrium fluoride, silicon fluoride, titanium trifluoride, and zirconium fluoride.
Claim 4
Dependent Claim
35 words
A pyrotechnic eradication means as set forth in claim 1 wherein said perfluoropolymer material is of the group consisting of polyfluoroethylene and perfluoroalkylenetriazine and said metal is of the group consisting of aluminum and magnesium.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |