US3440312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing plates of boron carbide powder
Assignee: Saint Gobain Abrasives Inc
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Filing: 1965-07-30
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Granted: 1969-04-22
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Expires: 1985-07-30
Abstract
No abstract record available.
Inventors
- 👤 Richard A Alliegro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:58
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/02; B28B3/025; C; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/991; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111; C04B35/515; C04B35/56; C04B35/5607; C04B35/5611; C04B35/58; C04B35/5805; C04B35/58064; C04B35/58071; C04B35/58078; C04B35/583; C04B35/622; C04B35/64; C04B35/645; C01P; C01P2004/00; C01P2004/20; C01P2006/00; C01P2006/10; C04B2235/00; C04B2235/02; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5436; C04B2235/70; C04B2235/74; C04B2235/77; C04B2235/94; C04B2235/96
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |