US2632738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of active carbon
Assignee: West Virginia Pulp and Paper Co
•
Filing: 1949-10-12
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Granted: 1953-03-24
•
Expires: 1969-10-12
Abstract
No abstract record available.
Inventors
- 👤 John W Hassler
- 👤 William E Mcminn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:20
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/30; C01B32/312; C01B32/318; C01B32/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
IN THE METHOD OF MAKING ACTIVE CARBON FROM BLACK LIQUOR IN WHICH THE BLACK LIQUOR IS CONCENTRATED, BURNED TO BLACK ASH, THE CARBON RECOVERED THEREFROM AND ACTIVATED, THE IMPROVEMENT WHICH CONSISTS IN: ADMIXTING WITH THE CONCENTRATED BLACK LIQUOR COMMINUTED CARBONACEOUS MATERIAL TO FORM A SUBSTANTIALLY HOMOGENEOUS FLOWABLE MIXTURE, SUCH CARBONACEOUS MATERIAL SERVING AS AN EXTENDER FOR THE CARBON CONTAINED IN THE BLACK LIQUOR, AND INCREASING THE YIELD OF ACTIVE CARBON OBTAINED.
Claim 2
Dependent Claim
71 words
IN THE METHOD OF MAKING ACTIVE CARBON FROM BLACK LIQUOR IN WHICH THE BLACK LIQUOR IS CONCENTRATED, BURNED TO BLACK ASH, THE CARBON RECOVERED THEREFROM AND ACTIVATED, THE IMPROVEMENT WHICH CONSISTS IN: ADMIXTING WITH THE CONCENTRATED BLACK LIQUOR COMMINUTED CARBONACEOUS MATERIAL TO FORM A SUBSTANTIALLY HOMOGENEOUS FLOWABLE MIXTURE, SUCH CARBONACEOUS MATERIAL SERVING AS AN EXTENDER FOR THE CARBON CONTAINED IN THE BLACK LIQUOR, AND INCREASING THE YIELD OF ACTIVE CARBON OBTAINED.
References Cited (Backward Citations)
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US1462752A
Cited
US1483160A
Cited
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Cited
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Cited
GB435345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |