Patent US4754875A successfully refreshed from Google Patents.
Patent US3525762A successfully refreshed from Google Patents.
US3525762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification and recovery of cobalt-containing catalysts
Assignee: Teijin Ltd
•
Filing: 1969-02-12
•
Granted: 1970-08-25
•
Expires: 1989-02-12
Abstract
No abstract record available.
Inventors
- 👤 Yataro Ichikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:22
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/04; B01J31/40; B01J31/4015; B01J31/4023; B01J31/403; C; C07; C07C; C07C51/00; C07C51/42; C07C51/487; B01J2231/00; B01J2231/70; B01J2531/00; B01J2531/80; B01J2531/84; B01J2531/845; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2964559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-24 | 1974-02-23 | 1974-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-24 | 1978-02-23 | 1978-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-24 | 1982-02-23 | 1982-08-25 | $7700.00 | Window Closed / Lapsed |