US3649342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Product for fabrication of dense ceramic armorplate and like
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1967-10-30
•
Granted: 1972-03-14
•
Expires: 1987-10-30
Abstract
Abstract A product and method for producing a dense hard ceramic body formed by impregnating a high melting point matrix with a ceramic infiltrant having a lower melting point whereby various ceramic shapes may be cold formed and then impregnated to produce hard, wear resistant bodies having a density up to the theoretical density for the ultimate product.
Inventors
- 👤 Howard J Bartlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:35
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B35/00; C04B35/515; C04B35/52; C04B35/56; C04B35/565; C04B41/45; C04B41/50; C04B41/5053; C04B41/5057; C04B41/80; C04B41/81; C04B41/85; C04B41/87; C04B2111/00; C04B2111/00241; C04B2111/00301; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/29
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
21 words
A ceramic body as in claim 1 wherein said interconnecting pores constitute about 12-20 percent of the volume of the matrix.
Claim 2
Dependent Claim
19 words
A ceramic body as in claim 2 wherein the silicon carbide grains are up to 20 mesh in size.
Claim 3
Dependent Claim
22 words
A ceramic body as in claim 3 wherein the silicon carbide grains are in the range up to 100 mesh in size.
References Cited (Backward Citations)
US2636825A
Cited
US2964823A
Cited
US2805197A
Cited
US3065088A
Cited
US3175918A
Cited
US3165864A
Cited
US3262762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |