US1454564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing zirconium dioxide
Assignee: Individual
•
Filing: 1922-11-18
•
Granted: 1923-05-08
•
Expires: 1942-11-18
Abstract
No abstract record available.
Inventors
- 👤 Ruff Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:49
CPC Classifications
C; C01; C01G; C01G25/00
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) | 1926-05-07 | 1926-11-06 | 1927-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-05-07 | 1930-11-06 | 1931-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-05-07 | 1934-11-06 | 1935-05-08 | $7700.00 | Window Closed / Lapsed |