US2786076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of phenanthrene to produce 2, 2'-diphenic acid and its esters
Assignee: Individual
•
Filing: 1953-10-27
•
Granted: 1957-03-19
•
Expires: 1973-10-27
Abstract
No abstract record available.
Inventors
- 👤 William F O'connor
- 👤 Emil J Moriconi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:36
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/285; C07C51/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN MAKING 2,2''-DIPHENIC ACID, THE PROCESS WHICH COMPRISES FORMING A MIXTURE OF 7-14 MOLES OF PERACETIC ACID OF CONCENTRATION 40% TO 90%, 1 MOLE OF PHENANTHRENE, AND AN ORGANIC LIQUID DILUENT THAT IS A CO-SOLVENT FOR THE ACID AND PHENANTHRENE AND IS NON-OXIDIZING IN CONTACT WITH THE ACID AND MAINTAINING THE MIXTURE AT A TEMPERATURE AT LEAST AS HIGH AS ABOUT 70*C. BUT NOT SUBSTANTIALLY ABOVE 110*C. UNTIL THE REACTION IS PRACTICALLY COMPLETE, WHEREBY 2,2''-DIPHENIC ACID IS FORMED.
Claim 2
Dependent Claim
78 words
IN MAKING 2,2''-DIPHENIC ACID, THE PROCESS WHICH COMPRISES FORMING A MIXTURE OF 7-14 MOLES OF PERACETIC ACID OF CONCENTRATION 40% TO 90%, 1 MOLE OF PHENANTHRENE, AND AN ORGANIC LIQUID DILUENT THAT IS A CO-SOLVENT FOR THE ACID AND PHENANTHRENE AND IS NON-OXIDIZING IN CONTACT WITH THE ACID AND MAINTAINING THE MIXTURE AT A TEMPERATURE AT LEAST AS HIGH AS ABOUT 70*C. BUT NOT SUBSTANTIALLY ABOVE 110*C. UNTIL THE REACTION IS PRACTICALLY COMPLETE, WHEREBY 2,2''-DIPHENIC ACID IS FORMED.
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) | 1960-03-18 | 1960-09-17 | 1961-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-18 | 1964-09-17 | 1965-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-18 | 1968-09-17 | 1969-03-19 | $7700.00 | Window Closed / Lapsed |