Patent US3406012A successfully refreshed from Google Patents.
US3406012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for classifying pigmentary metal oxide
Assignee: PPG Industries Inc
•
Filing: 1965-06-16
•
Granted: 1968-10-15
•
Expires: 1985-06-16
Abstract
No abstract record available.
Inventors
- 👤 Henry W Rahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:48
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07; C01G23/075; C01P; C01P2006/00; C01P2006/40; C01P2006/60; C01P2006/80
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |