US4574418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disk cleaning mat
Assignee: NAGAOKA KK
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Filing: 1985-01-18
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Granted: 1986-03-11
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Expires: 2005-01-18
Abstract
Abstract A disk cleaning mat wherein in the surface of a mat body first, second and third annular recesses for holding an LP disk, EP disk and a compact disk, respectively, are provided, and grounding portions electrically connected to the reverse side of the mat body are mounted on the respective recesses. The first and second recesses are concentric with each other, while the third recess is centered at a point offset from the common center of the first and second recesses.
Inventors
- 👤 Izumi Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:48
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/50; G11B23/505; G11B3/00; G11B3/58; G11B3/589
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
52 words
A disk cleaning mat comprising: a mat body provided in the surface thereof with first, second and third annular recesses corresponding in size to an LP disk, EP disk and a compact disk, respectively, and grounding portions provided in respective recesses and electrically connected to the reverse side of said mat body.
Claim 2
Dependent Claim
52 words
A disk cleaning mat comprising: a mat body provided in the surface thereof with first, second and third annular recesses corresponding in size to an LP disk, EP disk and a compact disk, respectively, and grounding portions provided in respective recesses and electrically connected to the reverse side of said mat body.
Claim 3
Dependent Claim
39 words
A disk cleaning mat according to claim 1, wherein said first and second recesses are concentric with each other, while said third recess is centered at a point offset from the common center of said first and second recesses.
Claim 4
Dependent Claim
27 words
A disk cleaning mat according to claim 1 or 2, wherein said mat body is provided with a slit for allowing the folding of said mat body.
Claim 5
Dependent Claim
39 words
A disk cleaning mat according to claim 1 or 2, wherein said mat body is provided in at least a part thereof with a folding line in the form of a groove which permits folding of said mat body.
Claim 6
Dependent Claim
27 words
A disk cleaning mat according to claim 3, further comprising a detachable holder adapted to clamp the outer peripheral edge of said mat body across said slit.
Claim 7
Dependent Claim
33 words
A disk cleaning mat according to claim 5, further comprising a holder rest provided on the outer peipheral edge of said mat body on which said holder resets when it is not used.
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) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |