Patent JPS4940133A successfully refreshed from Google Patents.
Patent DE66490C successfully refreshed from Google Patents.
Patent US4138456A successfully refreshed from Google Patents.
US4138456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Armor structure and method of producing ceramic armor
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1967-10-24
•
Granted: 1979-02-06
•
Expires: 1987-10-24
Abstract
Abstract A process for simultaneously upgrading arc furnace crude production of titanium diboride, titanium carbide and mixtures thereof by reacting the carbon present therein with boron trioxide and titanium oxide or with titanium dioxide alone while simultaneously hot pressing the reactants whereby to densify the resulting plate to maximize its modulus of elasticity and modulus of rupture for use in armor constructions, to form a hard ceramic plate adapted to be integrated with a fiber glass layer in the fabrication of armor.
Inventors
- 👤 Richard A. Alliegro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:05
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/5607; C04B35/5611; C04B35/58; C04B35/5805; C04B35/58064; C04B35/58071; C04B35/622; C04B35/64; C04B35/645
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A method of simultaneously upgrading a mixture of arc furnace TiB 2 crude and TiC crude, while forming a hot pressed shape therefrom comprising the steps of making a quantitative analysis of the arc furnace crude to determine the free carbon content thereof, blending TiO 2 and B 2 O 3 in substantially stoichiometric amounts, and then hot pressing the blended mass to the desired shape at a temperature in the range of from about 2050° C. to about 2250° C., at a pressure of from about 1500 psi to about 3000 psi, to produce a hard, dense, ceramic shape of a mixture of substantially pure TiC and TiB 2 .
Claim 2
Independent Claim
111 words
A method of simultaneously upgrading a mixture of arc furnace TiB 2 crude and TiC crude, while forming a hot pressed shape therefrom comprising the steps of making a quantitative analysis of the arc furnace crude to determine the free carbon content thereof, blending TiO 2 and B 2 O 3 in substantially stoichiometric amounts, and then hot pressing the blended mass to the desired shape at a temperature in the range of from about 2050° C. to about 2250° C., at a pressure of from about 1500 psi to about 3000 psi, to produce a hard, dense, ceramic shape of a mixture of substantially pure TiC and TiB 2 .
References Cited (Backward Citations)
US3041142A
Cited
US3161472A
Cited
US3143413A
Cited
US3013862A
Cited
US3328127A
Cited
US3632710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |