US3522279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation process
Assignee: Celanese Corp
•
Filing: 1963-10-22
•
Granted: 1970-07-28
•
Expires: 1983-10-22
Abstract
No abstract record available.
Inventors
- 👤 Hubert H Thigpen
- 👤 Wallace E Taylor
- 👤 Arthur W Schnizer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:28
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/64
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3278562A
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 |