US2671118A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystallization of trimethylol ethane
Assignee: Trojan Powder Co
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Filing: 1951-08-25
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Granted: 1954-03-02
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Expires: 1971-08-25
Abstract
No abstract record available.
Inventors
- 👤 Richard C Gangwer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:15
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; C07C29/76; C07C29/78
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
10 words
TRIMETHYLOL ETHANE DIHYDRATE OF THE COMPOSITION REPRESENTED BY THE FROMULA
Claim 2
Dependent Claim
10 words
TRIMETHYLOL ETHANE DIHYDRATE OF THE COMPOSITION REPRESENTED BY THE FROMULA
Claim 3
Dependent Claim
95 words
IN CRYSTALLIZING TRIMETHYLOL ETHANE, THE METHOD WHICH COMPRISES FORMING A SOLUTION OF THE TRIMETHYLOL ETHANE IN WATER IN THE PROPORTION OF AT LEAST ABOUT 35-50 PARTS BY WEIGHT OF WATER TO 100 OF THE TRIMETHYLOL ETHANE, COOLING THE SOLUTION TO A TEMPERATURE BELOW ABOUT 30* C. AND BELOW THAT OF SATURATION OF THE SOLUTION USED, AND MAINTAINING THE SOLUTION IN THE COOLED CONDITION UNTIL CRYSTALS OF HYDRATED TRIMETHYLOL ETHANE SEPARATE FROM THE SOLUTION THE EXACT PROPORTION OF WATER ABOVE THE MINIMUM STATED BEING ADEQUATE TO RETAIN THE TRIMETHYLOL ETHANE IN SOLUTION AT ABOUT 30* C.
Claim 4
Dependent Claim
95 words
IN CRYSTALLIZING TRIMETHYLOL ETHANE, THE METHOD WHICH COMPRISES FORMING A SOLUTION OF THE TRIMETHYLOL ETHANE IN WATER IN THE PROPORTION OF AT LEAST ABOUT 35-50 PARTS BY WEIGHT OF WATER TO 100 OF THE TRIMETHYLOL ETHANE, COOLING THE SOLUTION TO A TEMPERATURE BELOW ABOUT 30* C. AND BELOW THAT OF SATURATION OF THE SOLUTION USED, AND MAINTAINING THE SOLUTION IN THE COOLED CONDITION UNTIL CRYSTALS OF HYDRATED TRIMETHYLOL ETHANE SEPARATE FROM THE SOLUTION THE EXACT PROPORTION OF WATER ABOVE THE MINIMUM STATED BEING ADEQUATE TO RETAIN THE TRIMETHYLOL ETHANE IN SOLUTION AT ABOUT 30* C.
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) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |