Patent US3432399A successfully refreshed from Google Patents.
US3432399A
Expired / Lapsed
US
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Still and column with submerged combustion burners in the still
Assignee: Fluor Corp
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Filing: 1967-01-30
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Granted: 1969-03-11
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Expires: 1987-01-30
Abstract
No abstract record available.
Inventors
- 👤 Hermann C Schutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:55
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/32; B01D3/16; B01D3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB349567A
Cited
US2303811A
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US2756029A
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US2759328A
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US2781635A
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US2890166A
Cited
US2921004A
Cited
US2856074A
Cited
US3165452A
Cited
US3300392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |