Patent US3764456A successfully refreshed from Google Patents.
US3764456A
Expired / Lapsed
US
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Polymeric high performance composites
Assignee: University of Toronto Innovations Foundation
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Filing: 1970-09-28
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Granted: 1973-10-09
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Expires: 1990-09-28
Abstract
Abstract A HIGH PERFORMACE COMPOSITE OF POLYMER AND PLATELET REINFORCING MATERIAL, THE PLATELETS BEING OF MICA AND OF ASPECT RATIO AT LEAST ABOUT 30. THE PLATELETS ARE OF DIAMETER WITHIN THE RANGE 1 TO 1000 MICRONS AND 0.001 TO 100 MICRONS THICKNESS, AND CONSTITUTE ABOUT 10 UP TO ABOUT 75% BY VOL. OF THE COMPOSITE. THE MICA PLATELETS ARE PREPARED AND SELECTED TO BE OF HIGH ASPECT RATIO AND STRENGTH. TECHNIQUES FOR SEPARATING INTO PLATELETS, ENCAPSULATING THE PLATELETS WITH POLYMER, AND FOR ALIGNING THE PLATELETS IN THE MATRIX ARE DESCRIBED. STRESS-STAIN PROPERTIES OF THE COMPOSITE ARE VERY GOOD (PARTICULARLY IN THE PLANE OF ALIGNMENT) INDICATING APPLICATION AS A STRUCTURAL MATERIAL.
Inventors
- 👤 R Woodhams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:58
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K2201/00; C08K2201/016; Y; Y10; Y10S; Y10S106/00; Y10S106/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |