US3531310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of improved metal oxide pigment
Assignee: PPG Industries Inc
•
Filing: 1967-05-29
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Granted: 1970-09-29
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Expires: 1987-05-29
Abstract
No abstract record available.
Inventors
- 👤 Neil C Goodspeed
- 👤 Russell R May Jr
- 👤 Joseph Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:48
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/04; C09C3/041; C09C1/00; C09C1/36; C09C1/3607; C09C1/3615; C09C1/3623; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61
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) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |