US3284491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a peracid in a single liquid phase
Assignee: PPG Industries Inc
•
Filing: 1963-07-05
•
Granted: 1966-11-08
•
Expires: 1983-07-05
Abstract
No abstract record available.
Inventors
- 👤 Korach Malcolm
- 👤 Donald R Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:24
CPC Classifications
C; C07; C07C; C07C407/00; C07C407/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
IN THE PROCESS OF PREPARING A PERACID BY REACTING HYDROGEN PEROXIDE WITH A CARBOXYLIC ACID AND DISTILLING WATER AND WATER IMMISCIBLE SOLVENT WHICH FORMS AN AZEOTROPE WITH WATER FROM THE RESULTING REACTION MIXTURE, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE DISTILLATION FROM A MIXTURE WHICH CONTAINS SUFFICIENT INERT WATER SOLUBLE ORGANIC SOLVENT THAT NO LAYER OF AQUEOUS PHASE CAN SEPARATE FROM THE ORGANIC LIQUID PHASE.
Claim 2
Dependent Claim
64 words
IN THE PROCESS OF PREPARING A PERACID BY REACTING HYDROGEN PEROXIDE WITH A CARBOXYLIC ACID AND DISTILLING WATER AND WATER IMMISCIBLE SOLVENT WHICH FORMS AN AZEOTROPE WITH WATER FROM THE RESULTING REACTION MIXTURE, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE DISTILLATION FROM A MIXTURE WHICH CONTAINS SUFFICIENT INERT WATER SOLUBLE ORGANIC SOLVENT THAT NO LAYER OF AQUEOUS PHASE CAN SEPARATE FROM THE ORGANIC LIQUID PHASE.
References Cited (Backward Citations)
US2814641A
Cited
US2877266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |