US3469941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrafine boron nitride and process of making same
Assignee: AP Green Refractories Co
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Filing: 1967-09-05
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Granted: 1969-09-30
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Expires: 1987-09-05
Abstract
No abstract record available.
Inventors
- 👤 William E Kuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:39
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/583; C10M2201/00; C10M2201/06; C10M2201/061; C10M2201/16; C10M2201/18; C10N; C10N2050/00; C10N2050/10
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) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |