US3475123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing metal oxides
Assignee: PPG Industries Inc
•
Filing: 1967-02-24
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Granted: 1969-10-28
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Expires: 1987-02-24
Abstract
No abstract record available.
Inventors
- 👤 William L Wilson
- 👤 Franklin Strain
- 👤 Howard H Hoekje
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:17
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/14; C01B13/20; C01B13/22; C01B13/28; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/181; C01B33/183; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07; C01P; C01P2002/00; C01P2002/50; C01P2002/52; C01P2002/54; C01P2004/00; C01P2004/60; C01P2004/62; C01P2006/00; C01P2006/60; C01P2006/80; H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; H05H1/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |