US3751326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard transparent sheet-like material or coating
Assignee: Individual
•
Filing: 1971-07-14
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Granted: 1973-08-07
•
Expires: 1991-07-14
Abstract
Abstract A COMPOSITION OF MATTER IS DISCLOSED FOR PRODUCING A HARD SHEET OR COATING OF COMPOSITE MATERIAL COMPRISING A MATRIX OF PLASTIC MATERIAL HAVING DISPERSED THERETHROUGH FINELY DIVIDED HARD PARTICLES HAVING A HARDNESS OF AT LEAST 5, FOR EXAMPLE, PREFERABLY ABOUT 9.5, ON THE MOH''S SCALE. THE HARD PARTICLES MAY BE CONTROLLED AT A SIZE SUCH THAT LIGHT MAY BE TRANSMITTED THROUGH THE SHEET WITH LITTLE OR NO APPARENT LIGHT SCATTER. WHERE TRANSPARENCY IS NOT A CRITERION, THE AVERAGE PARTICLE SIZE MAY RANGE BROADLY OVER THE RANGE OF ABOUT 0.001 TO 10 MICRONS.
Inventors
- 👤 A Marks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:12
CPC Classifications
B; B44; B44F; B44F1/00; B44F1/06; C; C08; C08F; C08F2/00; C08F2/44; C08K; C08K3/00; C08K3/01; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/26; Y10T428/266
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |