Patent US2998016A successfully refreshed from Google Patents.
US2998016A
Expired / Lapsed
US
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Surge system
Assignee: Phillips Petroleum Co
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Filing: 1959-06-01
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Granted: 1961-08-29
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Expires: 1979-06-01
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Bottenberg
- 👤 Hurshel V Hendrix
- 👤 Maddox De Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:47
CPC Classifications
B; B65; B65G; B65G5/00; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0357; Y10T137/2496; Y10T137/2559; Y10T137/2562; Y10T137/2574; Y10T137/2579; Y10T137/2931; Y10T137/402
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2085526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |