US4554210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated anti-static skin-packaging material
Assignee: Hughes Missile Systems Co
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Filing: 1984-04-09
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Granted: 1985-11-19
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Expires: 2004-04-09
Abstract
Abstract A laminated packaging film useful for skin-packaging electrostatic-sensitive items and protecting the items from electrostatic damage during packaging and while the items are vacuumed, contained, and removed from packages. The film includes a pair of sheets of highly resistive, heat-sealable plastic between which is sandwiched a sheet of conductive, heat-sealable plastic. The film resists the buildup of static charges while the item is being packaged and forms a protective Faraday cage while the item is contained in the package.
Inventors
- 👤 Stuart G. Long
- 👤 Michael J. Maciocia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:55
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B7/00; B32B7/04; B32B7/12; B32B2250/00; B32B2250/03; B32B2250/24; B32B2250/242; B32B2307/00; B32B2307/20; B32B2307/202; B32B2307/21; B32B2307/30; B32B2307/31; B32B2553/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
A laminated, anti-static, heat sealable packaging material for packaging and preventing contamination of an electrostatically sensitive item packed in said packaging material, comprising: a first outer layer of heat-sealable, semi-conductive polyethylene having a surface resistivity at least 1×10 16 ohms per square; a second outer layer of heat-sealable, semi-conductive polyethylene having a surface resistivity at least 1×10 16 ohms per square; and a middle layer of heat-sealable polyethylene impregnated with a sloughable, electrically-conductive material providing said middle layer with a volume resistivity no more than 1×10 3 ohms per centimeter, said middle layer bondedly sandwiched between said first and second layers to prevent said electrically-conductive material sloughing from said middle layer to contaminate an electrostatically sensitive item when said item is heat-sealably packaged in said packaging material.
Claim 2
Dependent Claim
127 words
A laminated, anti-static, heat sealable packaging material for packaging and preventing contamination of an electrostatically sensitive item packed in said packaging material, comprising: a first outer layer of heat-sealable, semi-conductive polyethylene having a surface resistivity at least 1×10 16 ohms per square; a second outer layer of heat-sealable, semi-conductive polyethylene having a surface resistivity at least 1×10 16 ohms per square; and a middle layer of heat-sealable polyethylene impregnated with a sloughable, electrically-conductive material providing said middle layer with a volume resistivity no more than 1×10 3 ohms per centimeter, said middle layer bondedly sandwiched between said first and second layers to prevent said electrically-conductive material sloughing from said middle layer to contaminate an electrostatically sensitive item when said item is heat-sealably packaged in said packaging material.
Claim 3
Dependent Claim
83 words
A laminated flexible, skin-packaging material for heat sealably skin-packaging a static-sensitive item, comprising: a first outer layer of heat sealable electrically semi-conductive polyethylene having a surface resistivity exceeding 1×10 16 ohms per square; a second outer layer of heat-sealable electrically semi-conductive polyethylene having a surface resistivity exceeding 1×10 16 ohms per square; and a middle layer of heat-sealable polyethylene sandwiched between and bonded to said first and second outer layers and having a volume resistivity of less than 1×10 3 ohms per centimeter.
Claim 4
Dependent Claim
83 words
A laminated flexible, skin-packaging material for heat sealably skin-packaging a static-sensitive item, comprising: a first outer layer of heat sealable electrically semi-conductive polyethylene having a surface resistivity exceeding 1×10 16 ohms per square; a second outer layer of heat-sealable electrically semi-conductive polyethylene having a surface resistivity exceeding 1×10 16 ohms per square; and a middle layer of heat-sealable polyethylene sandwiched between and bonded to said first and second outer layers and having a volume resistivity of less than 1×10 3 ohms per centimeter.
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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) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |