Patent US4187347A successfully refreshed from Google Patents.
US4187347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated impregnated rovings
Assignee: BASF Structural Materials Inc
•
Filing: 1976-04-05
•
Granted: 1980-02-05
•
Expires: 1996-04-05
Abstract
Abstract Rovings impregnated with solid or preferably semi solid thermosetting resin and which can be handled in textile processing equipment are provided by overcoating the impregnated roving with a thermoplastic resin dispersed in a volatile liquid medium which does not dissolve the thermosetting resin to form an encapsulating membrane of thermoplastic resin around the impregnated roving to thereby provide the strength, flexibility, and surface properties needed for textile handling without degrading the properties desired in the final cured molded product.
Inventors
- 👤 Richard L. Brook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:35
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/40; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/587; D04H1/64; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2933; Y10T428/2938; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/2973
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
34 words
A solid impregnated roving comprising a fibrous roving impregnated with a thermosetting epoxy resin composition in uncured semi-solid form, said impregnated roving being encapsulated within a thin membrane coating of a solid phenolformaldehyde novolac.
Claim 2
Dependent Claim
34 words
A solid impregnated roving comprising a fibrous roving impregnated with a thermosetting epoxy resin composition in uncured semi-solid form, said impregnated roving being encapsulated within a thin membrane coating of a solid phenolformaldehyde novolac.
Claim 3
Dependent Claim
28 words
An impregnated roving as recited in claim 1 in which said thermosetting epoxy resin composition comprises a mixture of a liquid epoxy resin and a solid epoxy resin.
Claim 4
Dependent Claim
17 words
An impregnated roving as recited in claim 1 in which said thermosetting epoxy resin composition includes dicyandiamide.
Claim 5
Dependent Claim
20 words
An impregnated roving as recited in claim 1 in which said impregnated and encapsulated roving is of generally rectangular cross-section.
Claim 6
Dependent Claim
22 words
An impregnated roving as recited in claim 1 in which the encapsulated roving is dusted with a powder to reduce surface tackiness.
Claim 7
Dependent Claim
25 words
An impregnated roving as recited in claim 1 in which said thermosetting epoxy resin composition includes from 1-30% of a carboxylated or amine-terminated butadiene-acrylonitrile copolymer.
References Cited (Backward Citations)
US3224920A
Cited
US3323176A
Cited
US3307966A
Cited
US3296063A
Cited
US3377233A
Cited
US3579409A
Cited
US3473950A
Cited
US3661623A
Cited
US3931445A
Cited
US3728146A
Cited
US3806483A
Cited
US3775150A
Cited
US3895163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |