Patent US3769126A successfully refreshed from Google Patents.
US3769126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous-microsphere-glass fiber composite
Assignee: Westinghouse Electric Corp
•
Filing: 1970-01-30
•
Granted: 1973-10-30
•
Expires: 1990-01-30
Abstract
Abstract A low density, resinous filament-wound composite having fiber glass filaments embedded in a resinous matrix containing hollow glass microspheres whose surface is treated with a viscosity and bond improving agent such as a silane having at least one amino group and which microspheres are present in an amount of up to about 35 weight percent of the composite, whereby the composite has an improved weight-strength ratio.
Inventors
- 👤 R Kolek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:15
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/32; B; B29; B29B; B29B15/00; B29B15/08; B29B15/10; B29B15/12; B29B15/122; B29B15/125; B29C; B29C53/00; B29C53/80; B29C53/8008; B29C53/8066; C08J2363/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314; Y10T428/25; Y10T428/252; Y10T428/26; Y10T428/268; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2933; Y10T428/2964; Y10T428/31504; Y10T428/31511; Y10T428/31525
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
42 words
The method of claim 1 wherein the resin is epoxy resin, the mixture also contains about 1 to about 15 parts of curing agent, and the structure is a tubular member having up to about 55 percent by weight of glass fibers.
Claim 2
Dependent Claim
48 words
The method of claim 1 wherein the filaments are individually coated in step (b) by means of a roller applicator, the viscosity and bond improving agent also contains a lubricant and a wetting agent, and the resin-filled member is cured at a temperature between about 110* and 320*F.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein the glass fibers are hollow.
References Cited (Backward Citations)
US2806509A
Cited
US3030257A
Cited
US2885303A
Cited
US3281299A
Cited
US3316139A
Cited
US3425454A
Cited
US3438849A
Cited
US3412200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |