US2721787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free-flowing, nondusting titania
Assignee: Wyeth Holdings LLC
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Filing: 1950-10-23
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Granted: 1955-10-25
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Expires: 1970-10-23
Abstract
No abstract record available.
Inventors
- 👤 Ames B Hettrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:23
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/08; C23; C23D; C23D5/00; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/51; C01P2004/60; C01P2004/62; C01P2006/00; C01P2006/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2055221A
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US1937037A
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US2044941A
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US2131841A
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US2253551A
Cited
US2296618A
Cited
US2386885A
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US2439895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |