US3512219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection reactor for titanium dioxide production
Assignee: DAVID R STERN
•
Filing: 1965-10-19
•
Granted: 1970-05-19
•
Expires: 1985-10-19
Abstract
No abstract record available.
Inventors
- 👤 David R Stern
- 👤 Richard M Gundzik
- 👤 Peter M Jones
- 👤 Peter J Lynskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:54
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/26; C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2838585A
Cited
US2915367A
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US3085865A
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US3297411A
Cited
US3322499A
Cited
US3247890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |