US1922328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing synthetic rutile titanium dioxide
Assignee: Individual
•
Filing: 1931-12-23
•
Granted: 1933-08-15
•
Expires: 1951-12-23
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Rhodes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:53
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/003; C01G23/005; C01G23/04; C01G23/047; C01G23/053; C01G23/0532; C01G23/0534
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) | 1936-08-14 | 1937-02-13 | 1937-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-08-14 | 1941-02-13 | 1941-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-08-14 | 1945-02-13 | 1945-08-15 | $7700.00 | Window Closed / Lapsed |