US3402047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystallization separation and purification utilizing fresh feed to reslurry crystals
Assignee: Phillips Petroleum Co
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Filing: 1964-08-14
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Granted: 1968-09-17
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Expires: 1984-08-14
Abstract
No abstract record available.
Inventors
- 👤 Duane D Shaul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:11
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/81; A; A23; A23C; A23C1/00; A23C1/06; A23F; A23F3/00; A23F3/16; A23F3/22; A23F3/24; A23F5/00; A23F5/24; A23F5/28; A23F5/30; A23L; A23L2/00; A23L2/02; A23L2/08; A23L2/12; B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/004; B01D9/005; B01D9/0059; C07D; C07D201/00; C07D201/16; C12; C12H; C12H6/00; C12H6/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2815288A
Cited
US2874199A
Cited
US2854494A
Cited
US3193395A
Cited
US3255598A
Cited
US3285025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |