Patent US3255258A successfully refreshed from Google Patents.
US3255258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of alkylene oxides
Assignee: —
•
Filing: —
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Granted: 1966-06-07
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Expires: 1983-06-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:10
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/09; C07C29/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A PROCESS FOR THE PRODUCTION OF ALLYL ALCOHOL BY HEATING GASEOUS 1,2-PROPYLENE OXIDE IN CONTACT WITH TRILITHIUM PHOSPHATE, WHICH COMPRISES PASSING THE PROPYLENE OXIDE THROUGH A SUSPENSION OF FINE PARTICLES OF TRILITHIUM PHOSPHATE IN AN AUXILIARY LIQUID MAINTAINED AT A TEMPERATURE OF FROM 180*C. TO400*C., SAID LIQUID BEING SELECTED FROM THE GROUP CONSISTING OF AROMATIC HYDROCARBONS, SATURATED ALIPHATIC HYDROCARBONS AND ARYL OXIDES AND HAVING A MOLECULAR WEIGHT ABOVE 120, A BOILING POINT AT LEAST EQUAL TO THE TEMPERATURE OF THE SUSPENSION, A VISOCITY OF LESS THAN 2 CPS. AT 180*C., AND BEING SO STABLE AS TO AVOID SUBSTANTIAL DECOMPOSITION AT THE TEMPERATURE OF THE SUSPENSION, AT LEAST A MAJOR PART OF SAID AUXILIARY LIQUID BEING MAINTAINED IN THE LIQUID STATE DURING PASSAGE OF THE PROPYLENE OXIDE THERETHROUGH.
Claim 2
Dependent Claim
127 words
A PROCESS FOR THE PRODUCTION OF ALLYL ALCOHOL BY HEATING GASEOUS 1,2-PROPYLENE OXIDE IN CONTACT WITH TRILITHIUM PHOSPHATE, WHICH COMPRISES PASSING THE PROPYLENE OXIDE THROUGH A SUSPENSION OF FINE PARTICLES OF TRILITHIUM PHOSPHATE IN AN AUXILIARY LIQUID MAINTAINED AT A TEMPERATURE OF FROM 180*C. TO400*C., SAID LIQUID BEING SELECTED FROM THE GROUP CONSISTING OF AROMATIC HYDROCARBONS, SATURATED ALIPHATIC HYDROCARBONS AND ARYL OXIDES AND HAVING A MOLECULAR WEIGHT ABOVE 120, A BOILING POINT AT LEAST EQUAL TO THE TEMPERATURE OF THE SUSPENSION, A VISOCITY OF LESS THAN 2 CPS. AT 180*C., AND BEING SO STABLE AS TO AVOID SUBSTANTIAL DECOMPOSITION AT THE TEMPERATURE OF THE SUSPENSION, AT LEAST A MAJOR PART OF SAID AUXILIARY LIQUID BEING MAINTAINED IN THE LIQUID STATE DURING PASSAGE OF THE PROPYLENE OXIDE THERETHROUGH.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |