US2905731A
Expired / Lapsed
US
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Hydrocarbon conversion method
Assignee: Phillips Petroleum Co
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Filing: 1955-07-25
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Granted: 1959-09-22
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Expires: 1975-07-25
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Seed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:58
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/34; C10G9/36; C10G7/00; C10G7/06; C10G9/38; Y; Y10; Y10S; Y10S261/00; Y10S261/54; Y10S585/00; Y10S585/909; Y10S585/911; Y10S585/949; Y10S585/955
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |