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US5807002A Expired / Lapsed US ⏱️ 0.0 years remaining

Super-thin plastic key

Assignee: Silitech Technology Corp
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Filing: 1997-08-26
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Granted: 1998-09-15
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Expires: 2017-08-26
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Abstract

Abstract The subject invention relates to a type of super-thin plastic key, comprising a top part and a base part; said top part comprising a top part foundation, a layer of light permeable ink and a layer of light-proof ink; using a plastic film as the top part foundation; on said top part foundation is printed a layer of light permeable ink; on said light permeable ink is printed a layer of light-proof ink to display a letter or figure; said top part foundation printed with the light permeable ink and the light-proof ink is subjected to hot-press process to form a top part with a specified shape; said top part and the base part are again subjected to an extrusion monobloc forming process, to form a light permeable super-thin plastic key; by said configuration to achieve the requirements of light weight, thin, short, and small size for electronic telecommunication products; thus avoiding the weakness of poor adhesion and achieving the purposes of simple production and reduced costs.

Inventors

  • 👤 Jason Tsai

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 15:10
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/702; H01H13/705; H01H2219/00; H01H2219/028; H01H2229/00; H01H2229/05

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 110 words
A thin plastic key, comprising a top part and a base part; said top part comprising a top part foundation, a light permeable ink and a light-proof ink; said top part foundation being formed from a plastic film; a layer of said light permeable ink; a layer of said light-proof ink printed on said light permeable ink to form a letter or figure; means forming said top part foundation printed with said layer of light permeable ink and said layer of light-proof ink to a specified shape by a hot-press process; said top part and base part being extruded in a monobloc forming process to form a thin plastic key.
Claim 2
Dependent Claim 110 words
A thin plastic key, comprising a top part and a base part; said top part comprising a top part foundation, a light permeable ink and a light-proof ink; said top part foundation being formed from a plastic film; a layer of said light permeable ink; a layer of said light-proof ink printed on said light permeable ink to form a letter or figure; means forming said top part foundation printed with said layer of light permeable ink and said layer of light-proof ink to a specified shape by a hot-press process; said top part and base part being extruded in a monobloc forming process to form a thin plastic key.
Claim 3
Dependent Claim 21 words
The thin plastic key, as recited in claim 1, wherein the top part foundation is made of PC or PET material.
Claim 4
Dependent Claim 36 words
The thin plastic key, as recited in claim 1, wherein the base part is made of a material selected form the group consisting of: PC, AS resin, ABS resin or silicone material that is extrusion formed.

References Cited (Backward Citations)

JPH02260334A Cited
JPH02260335A Cited
US5036440A Cited
JPH04253119A Cited
US5401133A Cited
US5477430A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2001-09-14 2002-03-16 2002-09-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2005-09-14 2006-03-16 2006-09-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2009-09-14 2010-03-16 2010-09-15 $7700.00 Window Closed / Lapsed

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