US2431756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of terpenic hydrocarbons
Assignee: Universal Oil Products Co
•
Filing: 1945-02-28
•
Granted: 1947-12-02
•
Expires: 1965-02-28
Abstract
No abstract record available.
Inventors
- 👤 Vladimir N Ipatieff
- 👤 Pines Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:23
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/42; C07C5/50; C07C5/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1289444A
Cited
US1433666A
Cited
GB142738A
Cited
US1463122A
Cited
US1691066A
Cited
US2097743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |