US3230077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of refractory metals
Assignee: EIDP Inc
•
Filing: 1962-11-05
•
Granted: 1966-01-18
•
Expires: 1982-11-05
Abstract
No abstract record available.
Inventors
- 👤 Dale M Hiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:17
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/20; C22B34/24; C01; C01G; C01G35/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR STABILIZING A VAPOROUS PENTACHLORIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF NIOBIUM AND TANTALUM AGAINST DEPOSITION OF A LOWER CHLORIDE PRESENT IN THE VAPOR DURING ITS PASSAGE FROM ONE VESSEL TO ANOTHER THROUGH A TRANSFER CONDUIT WHICH COMPRISES MAINTAINING SAID CONDUIT DURING SAID PASSAGE UNDER A TEMPERATURE RANGING FROM 350*C. TO 500*C.
Claim 2
Dependent Claim
57 words
A PROCESS FOR STABILIZING A VAPOROUS PENTACHLORIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF NIOBIUM AND TANTALUM AGAINST DEPOSITION OF A LOWER CHLORIDE PRESENT IN THE VAPOR DURING ITS PASSAGE FROM ONE VESSEL TO ANOTHER THROUGH A TRANSFER CONDUIT WHICH COMPRISES MAINTAINING SAID CONDUIT DURING SAID PASSAGE UNDER A TEMPERATURE RANGING FROM 350*C. TO 500*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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |