US3419352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing alpha alumina monohydrate
Assignee: Vista Chemical Co
•
Filing: 1964-12-02
•
Granted: 1968-12-31
•
Expires: 1984-12-02
Abstract
No abstract record available.
Inventors
- 👤 Acciarri Jerry Anthony
- 👤 Ziegenhain William Charles
- 👤 Donald L Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:00
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/34; C01F7/36; C07; C07C; C07C29/00; C07C29/48; C07C29/50; C07C29/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3357791A
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US3264063A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |