US2489346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation process
Assignee: Standard Oil Development Co
•
Filing: 1945-08-11
•
Granted: 1949-11-29
•
Expires: 1965-08-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Albert B Welty
- 👤 Walter F Rollman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:23
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/255; C07C51/265; C07C51/31; C07C51/313
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1956482A
Cited
US1909354A
Cited
US2215095A
Cited
US2366372A
Cited
US2374518A
Cited
US2384946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |