US4278720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonded mat of directionally oriented strands and randomly oriented strands
Assignee: Owens Corning Fiberglas Technology Inc
•
Filing: 1979-05-02
•
Granted: 1981-07-14
•
Expires: 1999-05-02
Abstract
Abstract A bonded mat which can be stretched over projections without excessive thinning out and which permits fiber loadings of greater than 25 percent by volume. The mat includes directionally oriented strands held together by swirled strands or randomly oriented fibers, and all of which are permanently held together by a binder.
Inventors
- 👤 Richard F. Shannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:44
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/02; B; B32; B32B; B32B5/00; B32B5/02; B32B5/12; D04H5/00; D04H5/08; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24091; Y10T428/24124; Y10T428/24802; Y10T428/24826; Y10T442/00; Y10T442/60; Y10T442/643; Y10T442/644; Y10T442/69
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
111 words
A sheet molding compound comprising: a mat having two layers of long lengths of parallely oriented strand running at an angle to each other with a layer of randomly oriented glass strand positioned between said two parallely oriented strand layers and with strands of said layers touching each other at the points where said parallely oriented strands crossover randomly oriented strand, said layers being bonded by set organic binder that is limited generally to said crossover points, said mat being impregnated by a heat settable molding compound, and whereby a shifting between crossover points occurs during molding over projections to reduce wrinkling and prevent complete separation of the continuous strand layers.
Claim 2
Dependent Claim
111 words
A sheet molding compound comprising: a mat having two layers of long lengths of parallely oriented strand running at an angle to each other with a layer of randomly oriented glass strand positioned between said two parallely oriented strand layers and with strands of said layers touching each other at the points where said parallely oriented strands crossover randomly oriented strand, said layers being bonded by set organic binder that is limited generally to said crossover points, said mat being impregnated by a heat settable molding compound, and whereby a shifting between crossover points occurs during molding over projections to reduce wrinkling and prevent complete separation of the continuous strand layers.
Claim 3
Dependent Claim
96 words
A sheet molding compound comprising: a mat having a layer of long lengths of parallely oriented strand and a layer of randomly oriented glass strand and with strand of said layers touching each other at the points where said parallely oriented strands crossover randomly oriented strand, said layers being bonded by set organic binder that is limited generally to said crossover points, said mat being impregnated by a heat settable molding compound, and whereby a shifting between crossover points occurs during molding over projections to reduce wrinkling and prevent complete separation of the continuous strand layer.
Claim 4
Dependent Claim
96 words
A sheet molding compound comprising: a mat having a layer of long lengths of parallely oriented strand and a layer of randomly oriented glass strand and with strand of said layers touching each other at the points where said parallely oriented strands crossover randomly oriented strand, said layers being bonded by set organic binder that is limited generally to said crossover points, said mat being impregnated by a heat settable molding compound, and whereby a shifting between crossover points occurs during molding over projections to reduce wrinkling and prevent complete separation of the continuous strand layer.
Claim 5
Dependent Claim
16 words
The sheet molding compound of claim 2 wherein the molding compound comprises a thermosettable polyester resin.
References Cited (Backward Citations)
US2577214A
Cited
US2639759A
Cited
US2566960A
Cited
US2609319A
Cited
US2704734A
Cited
US2705686A
Cited
US2790741A
Cited
US2765248A
Cited
US3044146A
Cited
US4139591A
Cited
US3952124A
Cited
US4135029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |