US3245674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crucible coated with reaction product of aluminum and boron nitride coating
Assignee: National Research Corp
•
Filing: 1962-11-08
•
Granted: 1966-04-12
•
Expires: 1982-11-08
Abstract
No abstract record available.
Inventors
- 👤 Charles A Baer
- 👤 Philip J Clough
- 👤 Robert W Steeves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:20
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/243; F; F27; F27B; F27B14/00; F27B14/08; F27B14/10; F27B2014/104; Y; Y10; Y10S; Y10S117/00; Y10S117/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2453763A
Cited
US2480299A
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US2512230A
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US2670311A
Cited
GB766119A
Cited
US2925062A
Cited
US2759861A
Cited
US3063865A
Cited
US2938816A
Cited
US2945934A
Cited
US2963001A
Cited
US3063858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |