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US2627397A
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Bubble cap assembly for fractionating apparatus
Assignee: Phillips Petroleum Co
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Filing: 1949-08-08
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Granted: 1953-02-03
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Expires: 1969-08-08
Abstract
No abstract record available.
Inventors
- 👤 Hendrix Hurshel Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:16
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/163
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1808276A
Cited
US1711656A
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US1811247A
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US2218993A
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US2320073A
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US2428889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-03 | 1956-08-04 | 1957-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-03 | 1960-08-04 | 1961-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-03 | 1964-08-04 | 1965-02-03 | $7700.00 | Window Closed / Lapsed |