US2904508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent separation of hydrocarbons
Assignee: Cities Service Research and Development Co
•
Filing: 1955-05-31
•
Granted: 1959-09-15
•
Expires: 1975-05-31
Abstract
No abstract record available.
Inventors
- 👤 William B Hughes
- 👤 Wayne S Fallgatter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:58
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/20; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2792332A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |