Patent US3259662A successfully refreshed from Google Patents.
US3259662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of trimethylolpropane
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1962-04-02
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Granted: 1966-07-05
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Expires: 1982-04-02
Abstract
No abstract record available.
Inventors
- 👤 Jr William J Munley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:38
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; C07C29/76; C07C29/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN PROCESS FOR THE PREPARATION OF AN ALCOHOL SELECTED FROM THE GROUP CONSISTING OF TRIMETHYLOPROPANE AND NEOPENTYLGLYCOL WHEREIN A BUTYRALDEHYDE IS REACTED WITH FORMALDEHYDE IN THE PRESENCE OF AN INORGANIC BASE AND WHEREIN THE REACTION MIXTURE OBTAINED IS NEUTRALIZED WITH ACID AND STRIPPED OF EXCESS FORMALDEHYDE AND SUBSEQUENTLY ACIDIFIED AND THE ALCOHOL DISTILLED THEREFROM, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE DISTILLATION OF SAID ALCOHOL BY FIRST DISTILLING LIGHT ENDS FROM SAID FORMALDEHYDE-STRIPPED REACTION MIXTURE CONTAINING SAID ALCOHOL UNDER ACIDIC CONDITIONS AND SUBSEQUENTLY DISTILLING SAID ALCOHOL UNDER ALKALINE CONDITIONS TO PRODUCE AND ALCOHOL SUBSTANTIALLY FREE FROM ODOR AS THE OVERHEAD PRODUCT THEREFROM.
Claim 2
Dependent Claim
102 words
IN PROCESS FOR THE PREPARATION OF AN ALCOHOL SELECTED FROM THE GROUP CONSISTING OF TRIMETHYLOPROPANE AND NEOPENTYLGLYCOL WHEREIN A BUTYRALDEHYDE IS REACTED WITH FORMALDEHYDE IN THE PRESENCE OF AN INORGANIC BASE AND WHEREIN THE REACTION MIXTURE OBTAINED IS NEUTRALIZED WITH ACID AND STRIPPED OF EXCESS FORMALDEHYDE AND SUBSEQUENTLY ACIDIFIED AND THE ALCOHOL DISTILLED THEREFROM, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE DISTILLATION OF SAID ALCOHOL BY FIRST DISTILLING LIGHT ENDS FROM SAID FORMALDEHYDE-STRIPPED REACTION MIXTURE CONTAINING SAID ALCOHOL UNDER ACIDIC CONDITIONS AND SUBSEQUENTLY DISTILLING SAID ALCOHOL UNDER ALKALINE CONDITIONS TO PRODUCE AND ALCOHOL SUBSTANTIALLY FREE FROM ODOR AS THE OVERHEAD PRODUCT THEREFROM.
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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |