US2795537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distillation of xylene from dimethyl terephthalate
Assignee: EIDP Inc
•
Filing: 1952-06-21
•
Granted: 1957-06-11
•
Expires: 1972-06-21
Abstract
No abstract record available.
Inventors
- 👤 Kemp Harold Steen
- 👤 Pyle Cyrus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:42
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; C; C07; C07C; C07C67/00; C07C67/48; C07C67/52; C07C67/54; C07C7/00; C07C7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |