Patent US3549424A successfully refreshed from Google Patents.
US3549424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing filamentary boron
Assignee: RTX Corp
•
Filing: 1967-02-24
•
Granted: 1970-12-22
•
Expires: 1987-02-24
Abstract
No abstract record available.
Inventors
- 👤 Charles K Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:41
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/44; C23C16/54; C23C16/545; C23C16/22; C23C16/28; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2853970A
Cited
US2930347A
Cited
US3293074A
Cited
US3409469A
Cited
US3365330A
Cited
US3410715A
Cited
US3424603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |