Patent US1799952A successfully refreshed from Google Patents.
Patent US5199227A successfully refreshed from Google Patents.
US5199227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface finishing tape
Assignee: 3M Co
•
Filing: 1992-03-12
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Granted: 1993-04-06
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Expires: 2012-03-12
Abstract
Abstract A surface treating tape has a sheet-like backing covered with closely spaced protuberances which are coated with an abrasive layer which contains premium abrasive particles. The surface finishing tape is useful for finishing magnetic disks and other substrates to provide a percision finish.
Inventors
- 👤 Michihiro Ohishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:50
CPC Classifications
B; B24; B24D; B24D11/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
116 words
A surface finishing tape comprising: (a) a base portion having a sheet-like backing one surface of which is covered with an assemblage composed of a plurality of closely spaced protuberances, adjacent protuberances being separated by narrow spaces, wherein said protuberances are comprised of a mixture of binder and solid particles which are selected from the group consisting of silica, talc, aluminum hydroxide, clay, barium hydroxide, aluminum oxide, silicon carbide, boron nitride, chromium oxide, iron oxides, calcium carbonate and mixtures thereof; and (b) an abrasive layer which contains premium abrasives particles in a binder covering the surface of each of said protuberances without completely filling said narrow spaces whereby to provide grinding debris-collecting grooves between abrasive-covered protuberances.
Claim 2
Dependent Claim
116 words
A surface finishing tape comprising: (a) a base portion having a sheet-like backing one surface of which is covered with an assemblage composed of a plurality of closely spaced protuberances, adjacent protuberances being separated by narrow spaces, wherein said protuberances are comprised of a mixture of binder and solid particles which are selected from the group consisting of silica, talc, aluminum hydroxide, clay, barium hydroxide, aluminum oxide, silicon carbide, boron nitride, chromium oxide, iron oxides, calcium carbonate and mixtures thereof; and (b) an abrasive layer which contains premium abrasives particles in a binder covering the surface of each of said protuberances without completely filling said narrow spaces whereby to provide grinding debris-collecting grooves between abrasive-covered protuberances.
Claim 3
Dependent Claim
29 words
The surface finishing tape of claim 1 wherein said premium abrasive grains are comprised of a hard material selected from the group consisting of diamond and cubic boron nitride.
Claim 4
Dependent Claim
24 words
The surface finishing tape of claim 1 wherein said abrasive particles have an average particle size in the range of 0.1 to 100 μm.
Claim 5
Dependent Claim
15 words
The surface finishing tape of claim 1 wherein said sheet-like backing is polyethylene terephthalate film.
Claim 6
Dependent Claim
18 words
The surface finishing tape of claim 1 wherein said protuberances comprise saturated polyester resin cured with trifunctional isocyanate.
Claim 7
Dependent Claim
19 words
The surface finishing tape of claim 1 wherein said binder resin comprises saturated polyester resin cured with trifunctional isocyanate.
Claim 8
Dependent Claim
77 words
The surface finishing tape comprising: (a) a base portion having a sheet-like backing one surface of which is covered with an assemblage composed of a plurality of closely spaced protuberances comprised of Benard cells, adjacent protuberances being separated by narrow spaces; and (b) an abrasive layer which contains premium abrasive particles in a binder covering the surface of each of said protuberances without completely filling said narrow spaced whereby to provide grinding debris-collecting grooves between abrasive-covered protuberances.
Claim 9
Dependent Claim
77 words
The surface finishing tape comprising: (a) a base portion having a sheet-like backing one surface of which is covered with an assemblage composed of a plurality of closely spaced protuberances comprised of Benard cells, adjacent protuberances being separated by narrow spaces; and (b) an abrasive layer which contains premium abrasive particles in a binder covering the surface of each of said protuberances without completely filling said narrow spaced whereby to provide grinding debris-collecting grooves between abrasive-covered protuberances.
Claim 10
Dependent Claim
29 words
The surface finishing tape of claim 7 wherein said premium abrasive grains are comprised of a hard material selected from the group consisting of diamond and cubic boron nitride.
Claim 11
Dependent Claim
20 words
The surface finishing tape of claim 7 wherein said protuberances are comprised of a mixture of binder and solid particles.
Claim 12
Dependent Claim
40 words
The surface finishing tape of claim 9 wherein said solid particles are selected from the group consisting of silica, talc, aluminum hydroxide, clay, barium hydroxide, aluminum oxide, silicon carbide, boron nitride, chromium oxide, iron oxide, calcium carbonate and mixtures thereof.
Claim 13
Dependent Claim
24 words
The surface finishing tape of claim 7 wherein said abrasive particles have an average particle size in the range of 0.1 to 100 μm.
Claim 14
Dependent Claim
15 words
The surface finishing tape of claim 7 wherein said sheet-like backing is polyethylene terephthalate film.
Claim 15
Dependent Claim
18 words
The surface finishing tape of claim 7 wherein said protuberances comprise saturated polyester resin cured with trifunctional isocyanate.
Claim 16
Dependent Claim
19 words
The surface finishing tape of claim 7 wherein said binder resin comprises saturated polyester resin cured with trifunctional isocyanate.
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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) | 1996-04-05 | 1996-10-05 | 1997-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-05 | 2000-10-05 | 2001-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-05 | 2004-10-05 | 2005-04-06 | $7700.00 | Window Closed / Lapsed |