US3037060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reocvery of trimethylolalkanes
Assignee: Heyden Newport Chemical Corp
•
Filing: 1958-07-02
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Granted: 1962-05-29
•
Expires: 1978-07-02
Abstract
No abstract record available.
Inventors
- 👤 August W Dege
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:31
CPC Classifications
C; C07; C07C; C07C31/00; C07C31/18; C07C31/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
THE PROCESS OF RECOVERING A TRIMETHYLOLALKANE SELECTED FROM THE GROUP CONSISTING OF TRIMETHYLOLETHANE, TRIMETHYLOLPROPANE, AND TRIMETHYLOLBUTANE FROM AQUEOUS SOLUTION COMPRISING HEATING SAID SOLUTION AT A SUBATMOSPHERIC PRESSURE AT A TEMPERATURE BETWEEN THE VAPORIZATION TEMPERATURE OF WATER AND THE SUBLIMATION TEMPERATURE OF THE TRIMETHYLOLALKANE AT SAID SUBATMOSPHERIC PRESSURE FOR A PERIOD OF LESS THAN 2 MINUTES TO OBTAIN A VAPOR PHASE AND A MOLTEN TRIMETHYLOLALKANE PHASE, SEPARATING SAID VAPOR PHASE FROM SAID MOLTEN TRIMETHYLOLALKANE PHASE, AND THEREAFTER RECOVERING SAID MOLTEN TRIMETHYLOLALKANE PHASE.
Claim 2
Dependent Claim
81 words
THE PROCESS OF RECOVERING A TRIMETHYLOLALKANE SELECTED FROM THE GROUP CONSISTING OF TRIMETHYLOLETHANE, TRIMETHYLOLPROPANE, AND TRIMETHYLOLBUTANE FROM AQUEOUS SOLUTION COMPRISING HEATING SAID SOLUTION AT A SUBATMOSPHERIC PRESSURE AT A TEMPERATURE BETWEEN THE VAPORIZATION TEMPERATURE OF WATER AND THE SUBLIMATION TEMPERATURE OF THE TRIMETHYLOLALKANE AT SAID SUBATMOSPHERIC PRESSURE FOR A PERIOD OF LESS THAN 2 MINUTES TO OBTAIN A VAPOR PHASE AND A MOLTEN TRIMETHYLOLALKANE PHASE, SEPARATING SAID VAPOR PHASE FROM SAID MOLTEN TRIMETHYLOLALKANE PHASE, AND THEREAFTER RECOVERING SAID MOLTEN TRIMETHYLOLALKANE PHASE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-28 | 1965-11-27 | 1966-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-28 | 1969-11-27 | 1970-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-28 | 1973-11-27 | 1974-05-29 | $7700.00 | Window Closed / Lapsed |