US2689253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of hydrocarbons
Assignee: Celanese Corp
•
Filing: 1950-09-20
•
Granted: 1954-09-14
•
Expires: 1970-09-20
Abstract
No abstract record available.
Inventors
- 👤 Nat C Robertson
- 👤 Robert L Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:40
CPC Classifications
C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07C; C07C47/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2530509A
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US1224787A
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US1697266A
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US1729711A
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US1858095A
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US2475605A
Cited
US2482284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |