US3398013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of films of boron carbide
Assignee: JEROME J KROCHMAL
•
Filing: 1965-07-02
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Granted: 1968-08-20
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Expires: 1985-07-02
Abstract
No abstract record available.
Inventors
- 👤 Jerome J Krochmal
- 👤 Shapiro Isadore
- 👤 Charles T Lynch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:15
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/32; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/991
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3334967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |