US2623911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of aromatic compounds
Assignee: Beazer East Inc
•
Filing: 1948-06-30
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Granted: 1952-12-30
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Expires: 1968-06-30
Abstract
No abstract record available.
Inventors
- 👤 Corson Ben Bennett
- 👤 Joseph E Nickels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:19
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14; C07C15/00; C07C15/20; C07C15/24; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C5/00; C07C5/22; C07C5/27; C07C5/2729; C07C5/2732; C07C5/2735; C07C5/274; C07C2521/00; C07C2521/12; C07C2523/00; C07C2523/02; C07C2523/04; C07C2527/00; C07C2527/20; C07C2527/232
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A PROCESS OF ISOMERIZING AROMATIC COMPOUNDS WHICH EXIST IN THE FORM OF TWO OR MORE POSSIBLE ISOMERS HAVING THE FORMULA
Claim 2
Dependent Claim
20 words
A PROCESS OF ISOMERIZING AROMATIC COMPOUNDS WHICH EXIST IN THE FORM OF TWO OR MORE POSSIBLE ISOMERS HAVING THE FORMULA
References Cited (Backward Citations)
US1614660A
Cited
US2337123A
Cited
US2419796A
Cited
US2384505A
Cited
US2403757A
Cited
US2428102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |