US3522153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of separating xylene isomers by distillation with crystallization and isomerization of a side stream
Assignee: Badger Co Inc
•
Filing: 1968-04-04
•
Granted: 1970-07-28
•
Expires: 1988-04-04
Abstract
No abstract record available.
Inventors
- 👤 Norman B King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:27
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/02; C07C15/067; C07C15/08; B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0059; C07C15/073; C07C5/00; C07C5/22; C07C5/27; C07C5/2729; C07C5/2732; C07C5/2735; C07C5/2767; C07C5/277; C07C5/2772; C07C7/00; C07C7/005; C07C7/04; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2532276A
Cited
US2533232A
Cited
US2632779A
Cited
US2741646A
Cited
US2890252A
Cited
US2959626A
Cited
US3177264A
Cited
US3281337A
Cited
US3254024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |