US3501272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon purification process
Assignee: Standard Oil Co
•
Filing: 1966-02-28
•
Granted: 1970-03-17
•
Expires: 1986-02-28
Abstract
No abstract record available.
Inventors
- 👤 James L Benak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:44
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/469; C02F1/4691; B; B01; B01J; B01J47/00; B01J47/02; B01J47/06; B01J47/08; C01; C01B; C01B32/00; C02F1/461; C02F1/46104; C02F1/46109; C02F2001/46133
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB189923233A
Cited
GB191317731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |