US3424676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing organic contaminants using coal adsorbents
Assignee: United States Department of the Interior
•
Filing: 1965-08-25
•
Granted: 1969-01-28
•
Expires: 1985-08-25
Abstract
No abstract record available.
Inventors
- 👤 Glenn E Johnson
- 👤 Albert J Forney
- 👤 Joseph H Field
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:33
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/283
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB256316A
Cited
US1933567A
Cited
US2029962A
Cited
US2254745A
Cited
US2887451A
Cited
US3152985A
Cited
US3244621A
Cited
US3373085A
Cited
US3171802A
Cited
US3218253A
Cited
US3300403A
Cited
US3279603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |