Patent US2891671A successfully refreshed from Google Patents.
Patent US4922675A successfully refreshed from Google Patents.
US4922675A
Expired / Lapsed
US
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Abrasive tape
Assignee: Fujifilm Holdings Corp
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Filing: 1989-04-13
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Granted: 1990-05-08
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Expires: 2009-04-13
Abstract
Abstract An abrasive tape comprises a flexible substrate and an abrasive layer which is overlaid on the flexible substrate and which contains abrasive grains and a binder. The abrasive grains comprise first abrasive grains, which have a mean grain diameter within the range of 0.07 mu m to 0.40 mu m and a Mohs hardness within the range of 5 to 7, and second abrasive grains, which have a mean grain diameter within the range of 0.20 mu m to 0.60 mu m and a Mohs hardness not lower than 8.5.
Inventors
- 👤 Masami Sato
- 👤 Masaaki Fujiyama
- 👤 Takashi Iwasaki
- 👤 Masami Suzuki
- 👤 Takashi Yoneyama
- 👤 Hideaki Kosha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:59
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/1871; B; B24; B24B; B24B21/00; B24B21/16; B24D; B24D11/00; B24D3/00; B24D3/001; B24D3/002; B24D3/004; B24D3/02; B24D3/20; B24D3/28; B24D3/34; B24D3/346; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/24983; Y10T428/25; Y10T428/259
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
114 words
An abrasive tape comprising a flexible substrate and an abrasive layer which is overlaid on said flexible substrate and which contains abrasive grains and a binder, wherein said abrasive grains comprise first abrasive grains, which have a mean grain diameter within the range of 0.07 μm to 0.40 μm and a Mohs hardness within the range of 5 to 7, and second abrasive grains, which have a mean grain diameter within the range of 0.20 μm to 0.60 μm and a Mohs hardness not lower than 8.5, wherein the ratio of the weight of said first abrasive grains to the weight of said second abrasive grains falls within the range of 1.0:1 to 16.0:1.
Claim 2
Dependent Claim
114 words
An abrasive tape comprising a flexible substrate and an abrasive layer which is overlaid on said flexible substrate and which contains abrasive grains and a binder, wherein said abrasive grains comprise first abrasive grains, which have a mean grain diameter within the range of 0.07 μm to 0.40 μm and a Mohs hardness within the range of 5 to 7, and second abrasive grains, which have a mean grain diameter within the range of 0.20 μm to 0.60 μm and a Mohs hardness not lower than 8.5, wherein the ratio of the weight of said first abrasive grains to the weight of said second abrasive grains falls within the range of 1.0:1 to 16.0:1.
Claim 3
Dependent Claim
28 words
An abrasive tape as defined in claim 1 wherein the mean grain diameter of said first abrasive grains falls within the range of 0.07 μm to 0.15 μm.
Claim 4
Dependent Claim
28 words
An abrasive tape as defined in claim 1 wherein the mean grain diameter of said second abrasive grains falls within the range of 0.20 μm to 0.49 μm.
Claim 5
Dependent Claim
39 words
An abrasive tape as defined in claim 1 wherein the ratio of a value representing the grain size distribution of said first abrasive grains to a value representing the grain size distribution of said second abrasive grains is 1:2.
Claim 6
Dependent Claim
35 words
An abrasive tape as defined in claim 1 wherein the ratio of the weight of said first abrasive grains to the weight of said second abrasive grains falls within the range of 1.0:1 to 16.0:1.
Claim 7
Dependent Claim
53 words
An abrasive tape as defined in claim 1 wherein the proportion of the total weight of said first abrasive grains and said second abrasive grains to the weight of total solids which are contained in said abrasive layer comprising the abrasive grains and the binder falls within the range of 80% to 95%.
Claim 8
Dependent Claim
53 words
An abrasive tape as defined in claim 1 wherein the proportion of the total weight of said first abrasive grains and said second abrasive grains to the weight of total solids which are contained in said abrasive layer comprising the abrasive grains and the binder falls within the range of 90% to 95%.
Claim 9
Dependent Claim
26 words
An abrasive tape as defined in claim 1 wherein the surface roughness of said abrasive layer falls within the range of 0.046 μm to 0.130 μm.
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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) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |