Patent US4413298A successfully refreshed from Google Patents.
US4413298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diskette jacket
Assignee: 3M Co
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Filing: 1981-05-05
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Granted: 1983-11-01
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Expires: 2001-05-05
Abstract
Abstract A diskette jacket is made from biaxially-oriented polyester film containing particles of a different polymer which provide a matte finish that aesthetically masks scratches and smudges. The polyester film provides better resistance to pillowing and to scratching as compared to the polyvinylchloride diskette jackets of the prior art.
Inventors
- 👤 Roger L. Pecsok
- 👤 Ray G. McCrea, Jr.
- 👤 Craig F. Lamphere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:07
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; G; G11; G11B; G11B23/00; G11B23/02; G11B23/03; G11B23/033; G11B23/0332; B32B27/36; B32B7/00; B32B7/04; B32B7/12; G11B23/50; G11B23/505; B32B2307/00; B32B2307/40; B32B2307/408; B32B2307/41; B32B2307/50; B32B2307/514; B32B2307/518; B32B2439/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
An opaque diskette jacket comprising biaxially-oriented polyester film containing discrete, uniformly-distributed polymeric particles having an average diameter of 5 to 100 micrometers and comprising 5 to 30% by volume of the polyester film to provide a matte finish, an adhesive layer covering the inner face of the film, and a wiping fabric bonded by the adhesive layer to the inner face of the film.
Claim 2
Dependent Claim
64 words
An opaque diskette jacket comprising biaxially-oriented polyester film containing discrete, uniformly-distributed polymeric particles having an average diameter of 5 to 100 micrometers and comprising 5 to 30% by volume of the polyester film to provide a matte finish, an adhesive layer covering the inner face of the film, and a wiping fabric bonded by the adhesive layer to the inner face of the film.
Claim 3
Dependent Claim
20 words
A diskette jacket as defined in claim 1, wherein the thickness of said polyester film is 160 to 200 micrometers.
Claim 4
Dependent Claim
27 words
A diskette jacket as defined in claims 1 or 2, wherein said polyester film is a dual-layer film, the outer layer of which is a particle-containing polyester.
Claim 5
Dependent Claim
18 words
A diskette jacket as defined in claim 1, wherein said adhesive layer is filled with conductive carbon black.
Claim 6
Dependent Claim
14 words
A diskette jacket as defined in claim 1, wherein said polyester is polyethylene terephthalate.
Claim 7
Dependent Claim
24 words
A diskette jacket as defined in claim 1, wherein said polymeric particles comprise polyolefin having a melt flow rate of less than 2 dg/min.
Claim 8
Dependent Claim
23 words
A diskette jacket as defined in claim 6, wherein said polyolefin is polypropylene having a melt flow rate of 0.4 to 0.8 dg/min.
Claim 9
Dependent Claim
16 words
A diskette comprising a diskette jacket as defined in claim 1 enclosing a magnetic recording disk.
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) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |