Patent US3363447A successfully refreshed from Google Patents.
US3363447A
Expired / Lapsed
US
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Multiple chromatograph column heater unit
Assignee: Universal Oil Products Co
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Filing: 1966-02-14
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Granted: 1968-01-16
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Expires: 1986-02-14
Abstract
No abstract record available.
Inventors
- 👤 Richard K Severs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:49
CPC Classifications
H; H05; H05B; H05B3/00; G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/28; G01N30/30; G01N2030/3084; G01N30/88; G01N2030/8881; G01N30/38; G01N30/46; G01N30/466; G01N30/60; G01N30/6034; G01N30/6043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A MULTIPLE COLUMN HEATING UNIT PROVIDING FOR THE SELECTIVE INSERTION OF ONE CHROMATOGRAPH COLUMN OF A PLURALITY THEREOF INTO THE OVEN PORTION OF THE UNIT, WHICH COMPRISES IN COMBINATION, AN ELONGATED OVEN CHAMBER HAVING A HEAT SUPPLY SOURCE FOR HEATING A COLUMN THEREIN, ELONGATED MOVABLE WALL PORTIONS FOR SUCH CHAMBER PROVIDING FOR THE REPLACEMENT OF A COLUMN THEREIN, A PLURALITY OF COLUMNS EXTENDING FROM END MOUNTING MEANS, WITH THE LATTER BEING POSITIONED IN COMBINATION WITH SAID OVEN CHAMBER TO TRANSLATE WITH RESPECT THERETO AND IN TURN PERMIT ANY ONE OF SAID PLURALITY OF COLUMNS TO BE POSITIONED INTERIORLY WITHIN SAID OVEN CHAMBER UPON TEMPORARILY MOVING ASIDE SAID WALL PORTIONS OF SAID CHAMBER, AND ATTACHMENT MEANS AT THE ENDS OF EACH OF SAID PLURALITY OF COLUMNS FOR THE CONNECTION THEREOF TO A GAS SUPPLY MEANS.
Claim 2
Dependent Claim
134 words
A MULTIPLE COLUMN HEATING UNIT PROVIDING FOR THE SELECTIVE INSERTION OF ONE CHROMATOGRAPH COLUMN OF A PLURALITY THEREOF INTO THE OVEN PORTION OF THE UNIT, WHICH COMPRISES IN COMBINATION, AN ELONGATED OVEN CHAMBER HAVING A HEAT SUPPLY SOURCE FOR HEATING A COLUMN THEREIN, ELONGATED MOVABLE WALL PORTIONS FOR SUCH CHAMBER PROVIDING FOR THE REPLACEMENT OF A COLUMN THEREIN, A PLURALITY OF COLUMNS EXTENDING FROM END MOUNTING MEANS, WITH THE LATTER BEING POSITIONED IN COMBINATION WITH SAID OVEN CHAMBER TO TRANSLATE WITH RESPECT THERETO AND IN TURN PERMIT ANY ONE OF SAID PLURALITY OF COLUMNS TO BE POSITIONED INTERIORLY WITHIN SAID OVEN CHAMBER UPON TEMPORARILY MOVING ASIDE SAID WALL PORTIONS OF SAID CHAMBER, AND ATTACHMENT MEANS AT THE ENDS OF EACH OF SAID PLURALITY OF COLUMNS FOR THE CONNECTION THEREOF TO A GAS SUPPLY MEANS.
References Cited (Backward Citations)
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US3201921A
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US3139745A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-15 | 1971-07-17 | 1972-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-15 | 1975-07-17 | 1976-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-15 | 1979-07-17 | 1980-01-16 | $7700.00 | Window Closed / Lapsed |