US2415541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-boiling aromatic oil
Assignee: United Gas Improvement Co
•
Filing: 1944-02-19
•
Granted: 1947-02-11
•
Expires: 1964-02-19
Abstract
No abstract record available.
Inventors
- 👤 Frank J Soday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:03
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1483835A
Cited
US1441341A
Cited
US1924281A
Cited
US1985860A
Cited
GB459189A
Cited
US2150641A
Cited
US2220531A
Cited
US2319634A
Cited
US2363241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-10 | 1950-08-12 | 1951-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-10 | 1954-08-12 | 1955-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-10 | 1958-08-12 | 1959-02-11 | $7700.00 | Window Closed / Lapsed |