Patent US2865615A successfully refreshed from Google Patents.
US2865615A
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High pressure stirrer contacting apparatus
Assignee: Standard Oil Co
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Filing: 1955-04-29
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Granted: 1958-12-23
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Expires: 1975-04-29
Abstract
No abstract record available.
Inventors
- 👤 John I Slaughter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:29
CPC Classifications
B; B01; B01J; B01J3/00; B01J3/002; B01F; B01F33/00; B01F33/70; B01F33/71; B01F35/00; B01F35/30; B01F2035/35; B01F2035/351; Y; Y10; Y10S; Y10S277/00; Y10S277/93
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1515816A
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US2069338A
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US2136936A
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US2392542A
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US2326268A
Cited
CH242687A
Cited
US2558037A
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US2571560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |