US3730826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boron carbide ballistic armor modified with calcium boride,titanium and/or manganese
Assignee: Norton Research Corp Canada Ltd
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Filing: 1971-11-22
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Granted: 1973-05-01
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Expires: 1991-11-22
Abstract
Abstract COMPOSITE CERAMIC ARMOR WITH IMPROVED BALLISTIC PROPERTIES. BASIC BORON CARBIDE ARMOR IS IMPROVED BY THE ADDITION TO THE BORON CARBIDE OF CERTAIN QUANTITIES OF CALCIUM BORIDE, TITANIUM AND/OR MANGANESE, OR A COMBINATION OF ONE OR MORE OF THESE WITH CHROMIUM OR BORON. IMPROVED BALLISTICS ALSO RESULT FROM A MULTILAYER CERAMIC FACEPLATE WHEREIN ONE OR MORE LAYERS OF THE ABOVE MODIFIED BORON CARBIDE IS COMBINED WITH A LAYER OF BORON CARBIDE TO FOR, AN INTEGRAL CERMAIC FACE PLATE.
Inventors
- 👤 B Matchen
- 👤 D Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:16
CPC Classifications
B; B32; B32B; B32B18/00; C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/563; C04B35/622; C04B35/64; C04B35/645; F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0414; F41H5/0421; F41H5/0428; F41H5/0435; B32B2264/00; B32B2264/10; B32B2264/104; B32B2571/00; B32B2571/02
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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |