US2732393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of position isomers
Assignee: —
•
Filing: —
•
Granted: 1956-01-24
•
Expires: 1973-01-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:16
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/86; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0492; C07C209/00; C07C209/82; C07C209/86; C07C231/00; C07C231/22; C07C231/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
AS A NEW METHOD OF SEPARATING THE POSITION ISOMERS OF A DI-SUBSTITUTED AROMATIC COMPOUND HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
18 words
AS A NEW METHOD OF SEPARATING THE POSITION ISOMERS OF A DI-SUBSTITUTED AROMATIC COMPOUND HAVING THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US2402647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |