Patent US4728552A successfully refreshed from Google Patents.
US4728552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substrate containing fibers of predetermined orientation and process of making the same
Assignee: DuPont Electronic Materials Holding Inc
•
Filing: 1984-07-06
•
Granted: 1988-03-01
•
Expires: 2004-07-06
Abstract
Abstract The present invention relates to a poromeric article of manufacture comprising a felt sheet of fibers impregnated with microporous elastomer having a work surface, side surfaces joining the work surface and a support surface joining the side surfaces, wherein a majority of the fibers are oriented primarily transverse to the work surface such that the majority of fiber ends adjacent to the work surface form an angle of between about 45° and about 135° with respect to the work surface, and preferably, wherein the fibers have a uni-directional orientation substantially perpendicular to the work surface. The present invention also includes a plurality of such articles bonded together and oriented such that the work surfaces of adjacent articles are substantially coplanar to form a laminated article of manufacture. Further, processes for making the basic and laminated articles are set forth as other aspects of the invention.
Inventors
- 👤 Elmer W. Jensen, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:16
CPC Classifications
B; B24; B24B; B24B37/00; B24B37/11; B24B37/20; B24B37/24; B24D; B24D11/00; B24D11/001; B24D3/00; B24D3/001; B24D3/002; B24D3/02; B24D3/20; B24D3/22; B24D3/26; B24D3/34; B29; B29C; B29C70/00; B29C70/02; B29C70/021; B29C70/025; B29C70/04; B29C70/06; B29C70/10; B29C70/12; B29C70/14; B29C70/16; B29C70/20; B29K; B29K2021/00; B29K2105/00; B29K2105/04; B29L; B29L2031/00; B29L2031/736; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1075; Y10T156/1079; Y10T428/00; Y10T428/23907; Y10T428/2395
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
75 words
A poromeric article of manufacture comprising a felt sheet of fibers impregnated with microporous elastomer having a work surface, side surfaces joining the work surface and a support surface joining the side surfaces, wherein a majority of the fibers are oriented primarily transverse to the work surface such that the majority of fiber ends adjacent to the work surface form an angle of between about 45° and about 135° with respect to the work surface.
Claim 2
Dependent Claim
75 words
A poromeric article of manufacture comprising a felt sheet of fibers impregnated with microporous elastomer having a work surface, side surfaces joining the work surface and a support surface joining the side surfaces, wherein a majority of the fibers are oriented primarily transverse to the work surface such that the majority of fiber ends adjacent to the work surface form an angle of between about 45° and about 135° with respect to the work surface.
Claim 3
Dependent Claim
19 words
A poromeric article according to claim 1 wherein the fibers are uni-directional and substantially perpendicular to the work surface.
Claim 4
Dependent Claim
21 words
A poromeric article according to claim 1 wherein the elastomer is comprised of urethane and the fibers are comprised of polyester.
Claim 5
Dependent Claim
21 words
A poromeric article according to claim 2 wherein the elastomer is comprised of urethane and the fibers are comprised of polyester.
Claim 6
Dependent Claim
31 words
A poromeric article according to claim 1 in which there is a substantially uniform distribution throughout the thickness of the article of the fibers oriented primarily transverse to the work surface.
Claim 7
Dependent Claim
29 words
A laminated article of manufacture comprising a plurality of articles according to claim 1 bonded together and oriented such that the work surfaces of adjacent articles are substantially coplanar.
Claim 8
Dependent Claim
22 words
A laminated article of manufacture according to claim 6 in which the fibers are uni-directional and substantially perpendicular to the work surfaces.
Claim 9
Dependent Claim
23 words
A laminated article of manufacture according to claim 6 wherein the elastomer is comprised of urethane and the fibers are comprised of polyester.
Claim 10
Dependent Claim
21 words
A laminated article according to claim 7 wherein the elastomer is comprised of urethane and the fibers are comprised of polyester.
Claim 11
Dependent Claim
38 words
A laminated article according to claim 8 wherein the articles are bonded together by a bonding agent selected from urethane identical to the urethane of the article and an elastomeric adhesive compatible with the urethane of the article.
Claim 12
Dependent Claim
23 words
A laminated article according to claim 8 wherein the articles are bonded together by the same urethane as the urethane of the article.
Claim 13
Dependent Claim
19 words
An article according to claim 11 wherein the elastomer, fibers and bonding agent wear at substantially the same rate.
Claim 14
Dependent Claim
17 words
An article according to claim 1 wherein the elastomer and fibers wear at substantially the same rate.
Claim 15
Dependent Claim
14 words
An article according to claim 4 further comprising abrasive particles incorporated within the fibers.
Claim 16
Dependent Claim
12 words
An article according to claim 14 wherein the abrasive is titanium dioxide.
Claim 17
Dependent Claim
115 words
A process of making an article of manufacture comprising the steps: (a) making a preform by (i) forming a felt sheet made of fibers in which the majority of fibers are arranged to provide a predetermined orientation, (ii) impregnating the felt sheet with a microporous elastomer, and (iii) curing the elastomeric impregnated felt sheet; and (b) cutting the preform in such a manner that the majority of fibers are oriented primarily transverse to the cut surface, the cut surface forming a work surface whereby the predetermined orientation is such that the majority of fiber ends adjacent to the work surface form angles of between about 45° and about 135° with respect to the work surface.
Claim 18
Dependent Claim
115 words
A process of making an article of manufacture comprising the steps: (a) making a preform by (i) forming a felt sheet made of fibers in which the majority of fibers are arranged to provide a predetermined orientation, (ii) impregnating the felt sheet with a microporous elastomer, and (iii) curing the elastomeric impregnated felt sheet; and (b) cutting the preform in such a manner that the majority of fibers are oriented primarily transverse to the cut surface, the cut surface forming a work surface whereby the predetermined orientation is such that the majority of fiber ends adjacent to the work surface form angles of between about 45° and about 135° with respect to the work surface.
Claim 19
Dependent Claim
18 words
A process according to claim 16 wherein the fibers are uni-directional and substantially perpendicular to the work surface.
Claim 20
Dependent Claim
24 words
A process according to claim 16 further comprising the step of again cutting the article in a direction primarily transverse to the work surface.
Claim 21
Dependent Claim
18 words
A process according to claim 18 wherein the fibers are uni-directional and substantially perpendicular to the work surface.
Claim 22
Dependent Claim
33 words
A process according to claim 18 further comprising forming a laminated article of manufacture by bonding together a plurality of cut articles such that the work surfaces of adjacent articles are substantially coplanar.
Claim 23
Dependent Claim
18 words
A process according to claim 20 wherein the fibers are uni-directional and substantially perpendicular to the work surface.
Claim 24
Dependent Claim
36 words
A process according to claim 21 further comprising attaching the laminated article to a support whereby the work surface of the article is opposite to the surface of the support to which the article is attached.
Claim 25
Dependent Claim
16 words
A process according to claim 22 wherein the laminated article is adhesively bonded to the support.
Claim 26
Dependent Claim
14 words
A process according to claim 23 wherein the support has a curved mounting surface.
Claim 27
Dependent Claim
14 words
A process according to claim 23 wherein the support has a planar mounting surface.
References Cited (Backward Citations)
US3000757A
Cited
US3067483A
Cited
US3100721A
Cited
US3180853A
Cited
US3208875A
Cited
US3284274A
Cited
US3504457A
Cited
US3536553A
Cited
US3449870A
Cited
US3499250A
Cited
US3581439A
Cited
US4347280A
Cited
US4519804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |