Patent EP0494626A2 successfully refreshed from Google Patents.
US2622334A
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Assignee: Phillips Petroleum Co
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Filing: 1949-03-04
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Granted: 1952-12-23
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Expires: 1969-03-04
Abstract
No abstract record available.
Inventors
- 👤 Bruce F Wiley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:03
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1605923A
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US2030244A
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DE613489C
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US2018550A
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US2150070A
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US2340987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |