US4968545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite tube and method of manufacture
Assignee: Dexter Corp
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Filing: 1987-11-02
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Granted: 1990-11-06
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Expires: 2007-11-02
Abstract
Abstract The invention relates to tubular composite constructions of a composite comprising at least one layer of a prepreg construction of continuous filaments of high modulus fiber in a resin matrix and at least one layer of a thin film of syntactic foam comprising rigid microballoons uniformly dispersed in a matrix resin cocurable with the resin matrix of the prepreg.
Inventors
- 👤 Michael Fellman
- 👤 James J. Jarvis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:20
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B1/00; B32B1/08; B32B27/00; B32B27/06; B32B27/12; F; F16; F16L; F16L9/00; F16L9/12; F16L9/133; B32B2250/00; B32B2250/03; B32B2255/00; B32B2255/02; B32B2597/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1362; Y10T428/1372; Y10T428/1376; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249978; Y10T428/249979; Y10T428/24998; Y10T428/249987; Y10T428/249988; Y10T428/25; Y10T428/252; Y10T428/26; Y10T428/269; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
69 words
A tubular composite construction of a composite comprising at least one layer of a prepreg construction of continuous filaments of high modulus fiber in a resin matrix and at least one layer of a uniformly thick, thin film having a thickness ranging from about 0.007 to about 0.125 inch of syntactic foam comprising rigid microballoons uniformly dispersed in a matrix resin cocurable with the resin matrix of the prepreg.
Claim 2
Dependent Claim
69 words
A tubular composite construction of a composite comprising at least one layer of a prepreg construction of continuous filaments of high modulus fiber in a resin matrix and at least one layer of a uniformly thick, thin film having a thickness ranging from about 0.007 to about 0.125 inch of syntactic foam comprising rigid microballoons uniformly dispersed in a matrix resin cocurable with the resin matrix of the prepreg.
Claim 3
Dependent Claim
72 words
The tubular composite construction of claim 1 wherein the construction comprises a plurality of layers of a prepreg construction of continuous filaments of high modulus fiber in a resin matrix and at least one layer of a uniformly thick, thin film having a thickness ranging from about 0.007 to about 0.125 inch of syntactic foam comprising rigid microballoons uniformly dispersed in a matrix resin cocurable with the resin matrix of the prepreg.
Claim 4
Dependent Claim
74 words
The tubular composite construction of claim 1 wherein the tubular composite construction comprises a plurality of layers of a prepreg construction of continuous filaments of high modulus fiber in a resin matrix and a plurality of layers of uniformly thick, thin films having a thickness ranging from about 0.007 to about 0.125 inch of a syntactic foam comprising rigid microballoons uniformly dispersed in a matrix resin cocurable with the resin matrix of the prepeg.
Claim 5
Dependent Claim
83 words
The tubular composite construction of claim 1 wherein the tubular composite of the invention comprises at least one layer of a uniformly thick, thin film having a thickness ranging from about 0.007 to about 0.125 inch of syntactic foam containing rigid microballoons uniformly dispersed in a resin matrix laminated to a prepreg construction of continuous filaments of high modulus fiber in a resin matrix and separated from the exterior tubular surface by about one (1) to about ten (10) layers of such prepreg.
Claim 6
Dependent Claim
23 words
The tubular composite construction of claim 1 wherein the tubular composite forms part of a fishing pole construction possessing enhanced buckling load capabilities.
Claim 7
Dependent Claim
83 words
The tubular composite construction of claim 4 wherein the tubular composite of the invention comprises at least one layer of a uniformly thick, thin film having a thickness ranging from about 0.007 to about 0.125 inch of syntactic foam containing rigid microballoons uniformly dispersed in a resin matrix laminated to a prepreg construction of continuous filaments of high modulus fiber in a resin matrix and separated from the exterior tubular surface by about one (1) to about five (5) layers of such prepreg.
Claim 8
Dependent Claim
83 words
The tubular composite construction of claim 6 wherein the tubular composite of the invention comprises at least one layer of a uniformly thick, thin film having a thickness ranging from about 0.007 to about 0.125 inch of syntactic foam containing rigid microballoons uniformly dispersed in a resin matrix laminated to a prepreg construction of continuous filaments of high modulus fiber in a resin matrix and separated from the exterior tubular surface by about one (1) to about three (3) layers of such prepreg.
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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) | 1993-11-05 | 1994-05-07 | 1994-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-05 | 1998-05-07 | 1998-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-05 | 2002-05-07 | 2002-11-06 | $7700.00 | Window Closed / Lapsed |