US915172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of alloys of silicon.
Assignee: Individual
•
Filing: 1908-04-24
•
Granted: 1909-03-16
•
Expires: 1928-04-24
Abstract
No abstract record available.
Inventors
- 👤 Hans Goldschmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:22
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1204; C22B34/1209; C21; C21B; C21B13/00; C21B13/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1912-03-15 | 1912-09-14 | 1913-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-03-15 | 1916-09-14 | 1917-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-03-15 | 1920-09-14 | 1921-03-16 | $7700.00 | Window Closed / Lapsed |