US2646386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing vitamin b12-active product from sewage sludge
Assignee: SEWERAGE COMMISSION OF CIT
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Filing: 1951-03-03
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Granted: 1953-07-21
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Expires: 1971-03-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Carl Shelley Miner
- 👤 Wolnak Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:25
CPC Classifications
A; A61; A61K; A61K31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS OF PREPARING A PRODUCT HAVING A HIGH VITAMIN B12 POTENCY WHICH COMPRISES EXTRACTING WITH A SOLVENT FOR VITAMIN B12 A WATERSOLUBLE FRACTION FROM A SOLID SLUDGE RESULTING FROM THE MICROBIOLOGICAL TREATMENT OF SEWAGE COMPRISING A MASS OF MICROBIAL CELLS HAVING DISORGANIZED CELL WALLS WHEREBY TO PRODUCE A SOLUTION HAVING SAID WATER-SOLUBLE FRACTION DISSOLVED THEREIN, SEPARATING UNDISSOLVED SOLID SLUDGE FROM SAID SOLUTION, AND CONCENTRATING SAID FRACTION IN SAID SOLUTION WHEREBY TO PRODUCE SAID PRODUCT.
Claim 2
Dependent Claim
75 words
A PROCESS OF PREPARING A PRODUCT HAVING A HIGH VITAMIN B12 POTENCY WHICH COMPRISES EXTRACTING WITH A SOLVENT FOR VITAMIN B12 A WATERSOLUBLE FRACTION FROM A SOLID SLUDGE RESULTING FROM THE MICROBIOLOGICAL TREATMENT OF SEWAGE COMPRISING A MASS OF MICROBIAL CELLS HAVING DISORGANIZED CELL WALLS WHEREBY TO PRODUCE A SOLUTION HAVING SAID WATER-SOLUBLE FRACTION DISSOLVED THEREIN, SEPARATING UNDISSOLVED SOLID SLUDGE FROM SAID SOLUTION, AND CONCENTRATING SAID FRACTION IN SAID SOLUTION WHEREBY TO PRODUCE SAID PRODUCT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |