Patent US3424676A successfully refreshed from Google Patents.
US3424676A
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Process for removing organic contaminants using coal adsorbents
Assignee: United States Department of the Interior
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Filing: 1965-08-25
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Granted: 1969-01-28
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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 20:53
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/283
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB256316A
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US1933567A
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US2029962A
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US2254745A
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US2887451A
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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 |