US2985573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of metallic elements
Assignee: Compagnie de Saint Gobain SA
•
Filing: 1958-04-22
•
Granted: 1961-05-23
•
Expires: 1978-04-22
Abstract
No abstract record available.
Inventors
- 👤 Cherrier Claude
- 👤 Jacques Roland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:55
CPC Classifications
C; C22; C22B; C22B4/00; B; B01; B01J; B01J19/00; B01J19/08; B01J19/087; B01J19/088; C01; C01B; C01B19/00; C01B19/02; C01B33/00; C01B33/02; C22B5/00; C22B5/02; C22B5/12; C23; C23C; C23C16/00; C23C16/44; C23C16/50; C23C16/505; C23C16/507; H; H01; H01J; H01J37/00; H01J37/32; H01J37/32009; H01J37/32082; H01J37/32091; H10; H10P; H10P95/00; H01J2237/00; H01J2237/32; H01J2237/33; H01J2237/338
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD OF LIBERATING A METALLIC ELEMENT, FROM THE GROUP CONSISTING OF SI AND THE METALS OF THE 4TH, 5TH, AND 6TH GROUPS OF THE PERIODIC TABLE, FROM THE GROUP CONSISTING OF HYDROGENATED, ALKYLATED, AND HALOGENATED COMPOUNDS OF THE METALLIC ELEMENT, IN VAPOR PHASE, WHICH COMPRISES PASSING THROUGH THE COMPOUND IN VAPOR PHASE, IN A REACTION ZONE BETWEEN THE PLATES OF A CONDENSER, AT ABOUT THE FRITTING TEMPERATURE OF THE LIBERATED METALLIC ELEMENT AND A PRESSURE LESS THAN ABOUT 20 MM. HG, HIGH FREQUENCY CONDENSER DISCHARGE GENERATED BY UNDAMPED A.C. OF POWER BETWEEN ABOUT 5 AND 30 KW. AT A FREQUENCY BETWEEN ABOUT 400 KHZ. AND 20 MHZ.
Claim 2
Independent Claim
108 words
A METHOD OF LIBERATING A METALLIC ELEMENT, FROM THE GROUP CONSISTING OF SI AND THE METALS OF THE 4TH, 5TH, AND 6TH GROUPS OF THE PERIODIC TABLE, FROM THE GROUP CONSISTING OF HYDROGENATED, ALKYLATED, AND HALOGENATED COMPOUNDS OF THE METALLIC ELEMENT, IN VAPOR PHASE, WHICH COMPRISES PASSING THROUGH THE COMPOUND IN VAPOR PHASE, IN A REACTION ZONE BETWEEN THE PLATES OF A CONDENSER, AT ABOUT THE FRITTING TEMPERATURE OF THE LIBERATED METALLIC ELEMENT AND A PRESSURE LESS THAN ABOUT 20 MM. HG, HIGH FREQUENCY CONDENSER DISCHARGE GENERATED BY UNDAMPED A.C. OF POWER BETWEEN ABOUT 5 AND 30 KW. AT A FREQUENCY BETWEEN ABOUT 400 KHZ. AND 20 MHZ.
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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |