US3351071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon filter material and process for preparing it
Assignee: FMC Corp
•
Filing: 1964-12-23
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Granted: 1967-11-07
•
Expires: 1984-12-23
Abstract
No abstract record available.
Inventors
- 👤 Alan M Belfort
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:58
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28014; B01J20/2803; A; A24; A24D; A24D3/00; A24D3/06; A24D3/08; A24D3/10; A24D3/16; A24D3/163; B01D; B01D39/00; B01D39/02; B01D39/04; B01J20/28002; B01J20/28004; B01J20/28016; B01J20/28019; C; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/384
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
AN ARTICLE OF MANUFACTURE COMPRISING A SHAPED PARTICLE OF A HOMOGENEOUS MIXTURE OF FROM 5 TO 95% BY WEIGHT OF CELLULOSE CRYSTALLITE AGGREGATES HAVING A PARTICLE SIZE RANGING FROM ABOUT 0.1 TO 375 MICRONS, AND FROM 95 TO 5% BY WEIGHT OF CARBON HAVING PARTICLE SIZE RANGING FROM ABOUT 1 TO 65 MICRONS, SAID SHAPED PARTICLE HAVING AN AVERAGE DIAMETER RANGING FROM ABOUT 0.1 TO 25 MM.
Claim 2
Dependent Claim
67 words
AN ARTICLE OF MANUFACTURE COMPRISING A SHAPED PARTICLE OF A HOMOGENEOUS MIXTURE OF FROM 5 TO 95% BY WEIGHT OF CELLULOSE CRYSTALLITE AGGREGATES HAVING A PARTICLE SIZE RANGING FROM ABOUT 0.1 TO 375 MICRONS, AND FROM 95 TO 5% BY WEIGHT OF CARBON HAVING PARTICLE SIZE RANGING FROM ABOUT 1 TO 65 MICRONS, SAID SHAPED PARTICLE HAVING AN AVERAGE DIAMETER RANGING FROM ABOUT 0.1 TO 25 MM.
References Cited (Backward Citations)
US2768913A
Cited
US3110315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |