US3453319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas phase chromatographic separation of lanthanide rare earth chelates
Assignee: KENT J EISENTRAUT
•
Filing: 1966-11-14
•
Granted: 1969-07-01
•
Expires: 1986-11-14
Abstract
No abstract record available.
Inventors
- 👤 Kent J Eisentraut
- 👤 Robert E Sievers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:25
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/77; C01; C01F; C01F17/00; C01F17/10; C01F17/17; C01F17/20; C01F17/276; C01F17/30; C07C49/00; C07C49/92
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3254103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |