US2895809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-fluid contactor
Assignee: Universal Oil Products Co
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Filing: 1956-03-12
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Granted: 1959-07-21
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Expires: 1976-03-12
Abstract
No abstract record available.
Inventors
- 👤 Jack B Pohlenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:41
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0426; B01D11/043; B01D3/00; B01D3/14; B01D3/16; B01D3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A MULTI-STAGE LIQUID-FLUID CONTACTING COLUMN COMPRISING A VERTICAL SHELL HAVING UPPER FLUID INLET AND OUTLET MEANS AND LOWER FLUID INLET AND OUTLET MEANS, A PLURALITY OF VERTICALLY SPACED SIEVE DECK ASSEMBLIES IN THE SHELL, EACH OF SAID DECK ASSEMBLIES COMPRISING A PAIR OF VERTICALLY SPACED, HORIZONTAL PLATES, EACH OF SAID PLATES HAVING A PLURALITY OF HORIZONTALLY SPACED PERFORATIONS AND ONE OF SAID PLATES HAVING A GREATER PERFORATED AREA THAN THE OTHER,
Claim 2
Dependent Claim
71 words
A MULTI-STAGE LIQUID-FLUID CONTACTING COLUMN COMPRISING A VERTICAL SHELL HAVING UPPER FLUID INLET AND OUTLET MEANS AND LOWER FLUID INLET AND OUTLET MEANS, A PLURALITY OF VERTICALLY SPACED SIEVE DECK ASSEMBLIES IN THE SHELL, EACH OF SAID DECK ASSEMBLIES COMPRISING A PAIR OF VERTICALLY SPACED, HORIZONTAL PLATES, EACH OF SAID PLATES HAVING A PLURALITY OF HORIZONTALLY SPACED PERFORATIONS AND ONE OF SAID PLATES HAVING A GREATER PERFORATED AREA THAN THE OTHER,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |