Patent US2198937A successfully refreshed from Google Patents.
US2198937A
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Process for converting hydrocarbons
Assignee: Phillips Petroleum Co
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Filing: 1934-10-11
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Granted: 1940-04-30
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Expires: 1954-10-11
Abstract
No abstract record available.
Inventors
- 👤 Frederick E Frey
- 👤 Paul V Mckinney
- 👤 William H Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:02
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/10; C07C2521/00; C07C2521/12; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/901; Y10S585/903
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) | 1943-04-30 | 1943-10-30 | 1944-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-04-30 | 1947-10-30 | 1948-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-04-30 | 1951-10-30 | 1952-04-30 | $7700.00 | Window Closed / Lapsed |