US2622083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N --cx c chr- n - c-chs
Assignee: —
•
Filing: —
•
Granted: 1952-12-16
•
Expires: 1969-12-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:43
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/645; C07F9/6509; C07F9/6512; C07F9/6561; C07F9/65616
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
10 words
THE ESTER OF VITAMIN B1 REPRESENTED BY THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
10 words
THE ESTER OF VITAMIN B1 REPRESENTED BY THE FOLLOWING FORMULA:
Claim 3
Dependent Claim
111 words
IN A PROCESS OF PREPARING THE TRIPHOSPHORIC ACID ESTER OF VITAMIN B1, THE STEPS COMPRISING REACTING AT A TEMPERATURE BETWEEN ABOUT 145* C. AND ABOUT 150* C., THE HYDROCHLORIDE OF VITAMIN B1 WITH A PRODUCT OBTAINED BY HEATING ORTHOPHOSPHORIC ACID TO A TEMPERATURE OF ABOUT 340* C. TO TURBIDITY AND THE FORMATION OF CRYSTALS, DISSOLVING IN WATER THE REACTION MIXTURE CONTAINING THE TRIPHOSPHORIC ACID ESTER OF VITAMIN B1 THUS FORMED, ADDING THE RESULTING SOLUTION TO A SOLUTION OF STYPHNIC ACID IN ACETONE, SEPARATING THE OIL PERCIPITATED THEREBY, DISSOLVING SAID OIL IN WATER, DECOLORIZING THE SOLUTION FORMED THEREBY AND CRYSTALLIZING THE TRIPHOSPHORIC CID ESTER OF VITAMIN B1 FROM ACETONE AND ABSOLUTE ALCOHOL.
Claim 4
Dependent Claim
111 words
IN A PROCESS OF PREPARING THE TRIPHOSPHORIC ACID ESTER OF VITAMIN B1, THE STEPS COMPRISING REACTING AT A TEMPERATURE BETWEEN ABOUT 145* C. AND ABOUT 150* C., THE HYDROCHLORIDE OF VITAMIN B1 WITH A PRODUCT OBTAINED BY HEATING ORTHOPHOSPHORIC ACID TO A TEMPERATURE OF ABOUT 340* C. TO TURBIDITY AND THE FORMATION OF CRYSTALS, DISSOLVING IN WATER THE REACTION MIXTURE CONTAINING THE TRIPHOSPHORIC ACID ESTER OF VITAMIN B1 THUS FORMED, ADDING THE RESULTING SOLUTION TO A SOLUTION OF STYPHNIC ACID IN ACETONE, SEPARATING THE OIL PERCIPITATED THEREBY, DISSOLVING SAID OIL IN WATER, DECOLORIZING THE SOLUTION FORMED THEREBY AND CRYSTALLIZING THE TRIPHOSPHORIC CID ESTER OF VITAMIN B1 FROM ACETONE AND ABSOLUTE ALCOHOL.
References Cited (Backward Citations)
US2435750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |