Patent US3148247A successfully refreshed from Google Patents.
Patent US4493022A successfully refreshed from Google Patents.
Patent US3266948A successfully refreshed from Google Patents.
US3266948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbide deposition on tantalum
Assignee: Individual
•
Filing: 1963-10-10
•
Granted: 1966-08-16
•
Expires: 1983-10-10
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Mcguire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:20
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/60; C23C8/62; C23C8/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
THE METHOD OF FORMING A TANTALUM CARBIDE ON TANTALUM METAL COMPRISING HEATING THE TANTALUM METAL IN CONTACT WITH LAMPBLACK IN AN ATMOSPHERE OF HYDROGEN AT A TEMPERATURE BETWEEN 800 AND 1160*C.
Claim 2
Independent Claim
31 words
THE METHOD OF FORMING A TANTALUM CARBIDE ON TANTALUM METAL COMPRISING HEATING THE TANTALUM METAL IN CONTACT WITH LAMPBLACK IN AN ATMOSPHERE OF HYDROGEN AT A TEMPERATURE BETWEEN 800 AND 1160*C.
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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |