Patent US2380853A successfully refreshed from Google Patents.
US2380853A
Expired / Lapsed
US
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Method of producing aromatic hydrocarbons
Assignee: Standard Oil Development Co
•
Filing: 1942-08-29
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Granted: 1945-07-31
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Expires: 1962-08-29
Abstract
No abstract record available.
Inventors
- 👤 Norman F Linn
- 👤 Carl O Tongberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:40
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/02; C07C15/067; C07C15/08; C07C15/06; C07C5/00; C07C5/32; C07C5/373; C07C5/393; C07C5/41; C07C5/412
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) | 1948-07-30 | 1949-01-29 | 1949-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-07-30 | 1953-01-29 | 1953-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-07-30 | 1957-01-29 | 1957-07-31 | $7700.00 | Window Closed / Lapsed |