US3289838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal purification apparatus
Assignee: Phillips Petroleum Co
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Filing: 1963-07-29
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Granted: 1966-12-06
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Expires: 1983-07-29
Abstract
No abstract record available.
Inventors
- 👤 Samuel L Garrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:25
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0063; A; A23; A23C; A23C1/00; A23C1/06; A23L; A23L2/00; A23L2/02; A23L2/08; A23L2/12; B01D9/0004; B01D9/0013; B01D9/004; C; C12; C12H; C12H6/00; C12H6/04
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |