US2678799A
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US
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Assignee: Phillips Petroleum Co
•
Filing: 1948-01-02
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Granted: 1954-05-18
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Expires: 1968-01-02
Abstract
No abstract record available.
Inventors
- 👤 Clair Theodore Altamont St
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:44
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/04; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1654; Y10T137/7722; Y10T137/7781; Y10T137/7782; Y10T137/7837; Y10T137/7876; Y10T137/7877
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1633642A
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US1692296A
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US1957567A
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US2322517A
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US2563244A
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US2538806A
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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) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |