Patent US1322098A successfully refreshed from Google Patents.
Patent US3729372A successfully refreshed from Google Patents.
US3729372A
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Boron carbide ballistic armor modified with chromium and/or boron
Assignee: Norton Research Corp Canada Ltd
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Filing: 1971-11-22
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Granted: 1973-04-24
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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 QUATITIES OF CHROMIUM AND/OR BORON. IMPROVED BALLISTICS ALSO RESULT FROM A MULTILAYER CERAMIC FACE PLATE WHEREIN ONE OR MORE LAYER OF THE ABOVE MODIFIED BORON CARBIDE IS COMBINED WITH A LAYER OF BORON CARBIDE TO FORM AN INTERGRAL CERAMIC FACE PLATE.
Inventors
- 👤 B Matchen
- 👤 D Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:30
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; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |