US2779767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of paraldehyde
Assignee: Phillips Petroleum Co
•
Filing: 1953-01-19
•
Granted: 1957-01-29
•
Expires: 1973-01-19
Abstract
No abstract record available.
Inventors
- 👤 John E Mahan
- 👤 Stanley D Turk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:11
CPC Classifications
C; C07; C07D; C07D323/00; C07D323/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A PROCESS FOR THE PRODUCTION OF PARALDEHYDE WHICH COMPRISES CONTACTING A MIXTURE COMPRISING ACETALDEHYDE AND PARALDEHYDE WITH AN AMINE TYPE ANION EXCHANGE RESIN AN SUBSEQUENTLY DISTILLING SAID MIXTURE THEREBY SEPARATING ACETALDEHYDE AND PARALDEHYDE, TREATING WITH SAID ANION EXCHANGE RESIN PREVENTING REVERSION OF PARALDEHYDE TO ACETALDEHYDE DURING SAID DISTILLATION.
Claim 2
Dependent Claim
48 words
A PROCESS FOR THE PRODUCTION OF PARALDEHYDE WHICH COMPRISES CONTACTING A MIXTURE COMPRISING ACETALDEHYDE AND PARALDEHYDE WITH AN AMINE TYPE ANION EXCHANGE RESIN AN SUBSEQUENTLY DISTILLING SAID MIXTURE THEREBY SEPARATING ACETALDEHYDE AND PARALDEHYDE, TREATING WITH SAID ANION EXCHANGE RESIN PREVENTING REVERSION OF PARALDEHYDE TO ACETALDEHYDE DURING SAID DISTILLATION.
References Cited (Backward Citations)
CA488595A
Cited
US1300451A
Cited
GB147000A
Cited
US1864908A
Cited
US2318341A
Cited
US2479559A
Cited
US2615022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |