US2386957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrocyclization of aliphatic hydrocarbons
Assignee: Universal Oil Products Co
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Filing: 1941-12-24
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Granted: 1945-10-16
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Expires: 1961-12-24
Abstract
No abstract record available.
Inventors
- 👤 Vladimir N Ipatieff
- 👤 Haensel Vladimir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:11
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/373; C07C5/393; C07C5/41; C07C5/415
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-10-15 | 1949-04-16 | 1949-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-10-15 | 1953-04-16 | 1953-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-10-15 | 1957-04-16 | 1957-10-16 | $7700.00 | Window Closed / Lapsed |