US3784433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced composites
Assignee: Novartis AG
•
Filing: 1972-03-30
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Granted: 1974-01-08
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Expires: 1992-03-30
Abstract
Abstract Composites of unidirectional carbon fibers and a thermosettable resin are made by applying the resin as a continuous solid film to the carbon fibers, applying heat and pressure so that the resin flows about the fibers and forms a coherent structure, and then converting the resin into its solid, fusible B-stage.
Inventors
- 👤 E Garnish
- 👤 B Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:28
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29K; B29K2307/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
29 words
Method according to claim 1, wherein the resin is subsequently converting into a fully cured, insoluble, infusible C-stage product after the composite has been formed into any desired configuration.
Claim 2
Dependent Claim
42 words
Method according to claim 1 wherein a continuous film of a thermosettable resin composition is applied to one face of the carbon fibers and a continuous film of a different thermosettable resin composition is applied to another face of the carbon fibers.
Claim 3
Dependent Claim
32 words
Method according to claim 1, wherein the film of thermosettable resin composition is provided with a strippable backing sheet on the face opposite to that brought into contact with the carbon fibers.
Claim 4
Dependent Claim
42 words
Method according to claim 1, wherein the carbon fibers are laid on a continuous film of a thermosettable resin composition, then a second continuous film of a thermosettable resin composition is laid on top of the fibers and the assembly is pressed.
Claim 5
Dependent Claim
49 words
Method according to claim 1, wherein the composite is manufactured continuously, the carbon fibers being contacted on one face with a said continuous film of a thermosettable resin composition and a second continuous solid film of a thermosettable resin composition being applied to the reverse face of the fibers.
Claim 6
Dependent Claim
30 words
Method according to claim 6, wherein the composite is manufactured continuously, two such said continuous films of thermosettable resin composition being applied simultaneously to each face of the carbon fibers.
Claim 7
Dependent Claim
17 words
Method according to claim 1, wherein the continuous film contains a thermoplastic resin which is not heat-curable.
Claim 8
Dependent Claim
20 words
Method according to claim 8, wherein the said continuous film contains a resole and a poly(vinyl acetal) or a nylon.
Claim 9
Dependent Claim
21 words
Method according to claim 8 wherein the said continuous film contains a novolac and a neoprene rubber or an acrylonitrile rubber.
Claim 10
Dependent Claim
57 words
Method according to claim 8, wherein the said continuous film contains an epoxide resin and a thermoplastic resin which is a. a polyarylene polyhydroxy polyether, substantially free from 1,2-epoxide groups, being a copolymer of a dihydric phenol either with a diglycidyL ether of a dihydric phenol or with epichlorohydrin and contains recurring units represented by the formula
References Cited (Backward Citations)
US2959511A
Cited
US3150792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |