US2824799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for sintering and recovering sponge metal
Assignee: Millennium Petrochemicals Inc
•
Filing: 1955-08-24
•
Granted: 1958-02-25
•
Expires: 1975-08-24
Abstract
No abstract record available.
Inventors
- 👤 Virgil L Hansley
- 👤 Schott Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:20
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1295
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
IN A PROCESS OF PRODUCTION OF A TITANIUM SPONGE BY HEATING AT A TEMPERATURE OF ABOUT 850* TO 1050* C. A MIXTURE COMPSIRING FINELY DIVIDED TITANIUM METAL AND SODIUM CHLORIDE WHEREIN THE SODIUM CHLORIDE IS ESSENTIALLY IN A MOLTEN STATE AT THE END OF THE HEATING PERIOD, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID HEATING IN A CLOSED HEATING ZONE CONTANINING A PERFORATED LIFTING ZONE CONTAINING A MIXTURE OF FINELY DIVIDED TITANIUM METAL AND SODIUM CHLORIDE AND, AT THE END OF SAID HEATING PERIOD WHILE TEH SODIUM CHLORIDE IS MOTLEN, LIFTING THE PERFORATED LIFTING ZONE, CONTAINING TITANIUM SPONGE FORMED DURING SAID HEATING OUT OF CONTACT WITH THE MOLTEN BODY OF SODIUM CHLORIDE IN THE HEATING ZONE AND PERMITTING ADHERING MOLTEN SODIUM CHLORIDE TO DRAIN FROM THE TITANIUM SPONGE IN SAID LIFTING ZONE WHILE THE LIFTING ZONE IS OUT OF CONTACT WITH THE BODY OF MOLTEN SODIUM CHLORIDE AND WHILE THE TITANIUM SPONGE IS NOT EXPOSED TO THE ATMOSPHERE.
Claim 2
Dependent Claim
158 words
IN A PROCESS OF PRODUCTION OF A TITANIUM SPONGE BY HEATING AT A TEMPERATURE OF ABOUT 850* TO 1050* C. A MIXTURE COMPSIRING FINELY DIVIDED TITANIUM METAL AND SODIUM CHLORIDE WHEREIN THE SODIUM CHLORIDE IS ESSENTIALLY IN A MOLTEN STATE AT THE END OF THE HEATING PERIOD, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID HEATING IN A CLOSED HEATING ZONE CONTANINING A PERFORATED LIFTING ZONE CONTAINING A MIXTURE OF FINELY DIVIDED TITANIUM METAL AND SODIUM CHLORIDE AND, AT THE END OF SAID HEATING PERIOD WHILE TEH SODIUM CHLORIDE IS MOTLEN, LIFTING THE PERFORATED LIFTING ZONE, CONTAINING TITANIUM SPONGE FORMED DURING SAID HEATING OUT OF CONTACT WITH THE MOLTEN BODY OF SODIUM CHLORIDE IN THE HEATING ZONE AND PERMITTING ADHERING MOLTEN SODIUM CHLORIDE TO DRAIN FROM THE TITANIUM SPONGE IN SAID LIFTING ZONE WHILE THE LIFTING ZONE IS OUT OF CONTACT WITH THE BODY OF MOLTEN SODIUM CHLORIDE AND WHILE THE TITANIUM SPONGE IS NOT EXPOSED TO THE ATMOSPHERE.
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) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |