Patent US2476453A successfully refreshed from Google Patents.
US2476453A
Expired / Lapsed
US
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Titaniferous material for producing titanium dioxide
Assignee: Quebec Iron & Titanium Corp
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Filing: 1947-08-19
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Granted: 1949-07-19
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Expires: 1967-08-19
Abstract
No abstract record available.
Inventors
- 👤 Willis M Peirce
- 👤 Robert K Waring
- 👤 Luther D Fetterolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:23
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1236; C22B34/124; C22B34/125; C22B34/1204
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US625656A
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GB190103582A
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US921686A
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US930344A
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US1334004A
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US1743885A
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US1831852A
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US1745360A
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US2375268A
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US2471242A
Cited
US2445377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |