US2835566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum manufacture
Assignee: Pechiney SA
•
Filing: 1956-11-01
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Granted: 1958-05-20
•
Expires: 1976-11-01
Abstract
No abstract record available.
Inventors
- 👤 Perieres Rene
- 👤 Ruelle Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:20
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/0038; C22B21/0053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
PROCESS OF PRODUCING ALUMINUM BY THE DISSOCIATION A ALUMINUM NITRIDE IN A VACUUM AT HIGH TEMPERATURES INTO ALUMINUM AND NITROGEN IN THE GASEOUS STSTE, AND WHEREBY THE ALUMINUM IS SUBSEQUENTLY CONDENSED IN A CONDENSATION ZONE, AND WHEREIN THE NITRIDE IS CONTAMINATED BY CARBON AND ALUMINUM OXIDE LEADING TO THE FORMATION OF DETERMEN TAL CARBONITRIDE COMPOUNDS BY THE REACTION OF THE COMTAMINANTS WITH THE GASEOUS DISSOCIATION PRODUCTS, THE IMPROVEMENT IN SAID PROCESS WHICH COMPRISES THE COMBINATION THEREWITH THE STEPS OF: DEPOSITING THE CARBONITRIDE COMPOUNDS AS SINTERS IN A TRAP ZONE IN ADVANCE OF THE ALUMINUM CONDENSATION ZONE, AND THEREAFTER CONDENSING THE ALUMINUM IN THE LIQUID STATE IN THE
Claim 2
Dependent Claim
107 words
PROCESS OF PRODUCING ALUMINUM BY THE DISSOCIATION A ALUMINUM NITRIDE IN A VACUUM AT HIGH TEMPERATURES INTO ALUMINUM AND NITROGEN IN THE GASEOUS STSTE, AND WHEREBY THE ALUMINUM IS SUBSEQUENTLY CONDENSED IN A CONDENSATION ZONE, AND WHEREIN THE NITRIDE IS CONTAMINATED BY CARBON AND ALUMINUM OXIDE LEADING TO THE FORMATION OF DETERMEN TAL CARBONITRIDE COMPOUNDS BY THE REACTION OF THE COMTAMINANTS WITH THE GASEOUS DISSOCIATION PRODUCTS, THE IMPROVEMENT IN SAID PROCESS WHICH COMPRISES THE COMBINATION THEREWITH THE STEPS OF: DEPOSITING THE CARBONITRIDE COMPOUNDS AS SINTERS IN A TRAP ZONE IN ADVANCE OF THE ALUMINUM CONDENSATION ZONE, AND THEREAFTER CONDENSING THE ALUMINUM IN THE LIQUID STATE IN THE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |