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US3728211A Expired / Lapsed US ⏱️ 0.0 years remaining

Reinforced composite

Assignee: United States Steel Corp
•
Filing: 1971-08-30
•
Granted: 1973-04-17
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Expires: 1991-08-30
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Abstract

Abstract A REINFORCED COMPOSITE OF A CASTABLE MATRIX HAVING DISCONTINUES REINFORCING FILAMENTS RANDOMLY DISTRIBUTED WITHOUT THE MATRIX WHICH REINFORCE THE MATRIX AND WHICH ARE BONDED TO THE MATRIX CHEMICALLY AND/OR MECHANICALLY. THE FILAMENTS HAVE A NON-ROUND CROSS SECTIONAL CONFIGURATION WITH WIDTH AND THICKNESS DIMENSIONS AND WITH A WIDTH-TO-THICKNESS RATIO OF NOT GREATER THAN ABOUT FIVE. FOR MAXIMUM REINFORCING STRENGTH, THE FILAMENTS SHOULD HAVE AN ULTIMATE TENSILE STRENGTH AT LEAST EQUAL TO THE AVERAGE TENSILE STRESS DEVELOPED IN THE FILAMENT AT BOND FAILURE. THE CHARACTERISTICS OF THE FILAMENTS ARE SUCH AS TO PERMIT DRY ADMIXING WITH THE CASTABLE MATRIX MATERIAL. A METHOD OF MAKING THE REINFORCED COMPOSITE AND APPARATUS FOR ANS A METHOD OF COATING THE FILAMENTS ARE DISCLOSED.

Inventors

  • 👤 C Ball
  • 👤 A Grimm
  • 👤 T Melville

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 17:40
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/01; E04C5/012; C; C04; C04B; C04B20/00; C04B20/0048; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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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) 1976-04-16 1976-10-16 1977-04-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-04-16 1980-10-16 1981-04-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-04-16 1984-10-16 1985-04-17 $7700.00 Window Closed / Lapsed

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