US3155493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing high purity aluminum
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1961-08-07
•
Granted: 1964-11-03
•
Expires: 1981-08-07
Abstract
No abstract record available.
Inventors
- 👤 Tanaka Ryoma
- 👤 Yurimoto Juntaro
- 👤 Ryu Hirosuke
- 👤 Shioji Yuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:02
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/0038; C22B21/0053; C22B21/0015; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A METHOD FOR MANUFACTURING HIGH PURITY ALUMINUM, WHICH COMPRISES DECOMPOSING AN ALKYLALUMINUM COMPOUND HAVING THE GENERAL FORUMLA OF
Claim 2
Independent Claim
18 words
A METHOD FOR MANUFACTURING HIGH PURITY ALUMINUM, WHICH COMPRISES DECOMPOSING AN ALKYLALUMINUM COMPOUND HAVING THE GENERAL FORUMLA OF
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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |