US3224277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Environmental apparatus
Assignee: Chicago Bridge and Iron Co
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Filing: 1962-02-16
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Granted: 1965-12-21
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Expires: 1982-02-16
Abstract
No abstract record available.
Inventors
- 👤 Robert S Chamberlin
- 👤 Lyle V Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:46
CPC Classifications
B; B64; B64G; B64G7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
ENVIRONMENTAL APPARATUS COMPRISING: AN OUTER CHAMBER CONSTRUCTED OF CARBON STEEL; AN INNER CHAMBER LOCATED ENTIRELY WITHIN SAID OUTER CHAMBER AND CONSTRUCTED OF A METALLIC MATERIAL RELATIVELY DUCTILE AT THE TEMPERATURE OF LIQUID NITROGEN; SAID INNER CHAMBER HAVING INNER AND OUTER WALLS WITH MUTUALLY OPPOSED SURFACES SPACED APART ALONG THE ENTIRE MEANS OF SAID SURFACES TO DEFINE CHANNEL MEANS THEREBETWEEN; SAID CHAMBERS INCLUDING MEANS DEFINING A SPACE THEREBETWEEN; MEANS FOR EVACUATING THE SPACE BETWEEN SAID CHAMBERS TO A PRESSURE LEVEL WHERE HEAT TRANSFER BY CONVECTION IS NOT SIGNIFICANT; MEANS FOR EVACUATING THE INTERIOR OF THE INNER CHAMBER TO A PRESSURE LEVEL SUBSTANTIALLY LOWER THAN THAT IN THE SPACE BETWEEN THE TWO CHAMBERS; AN INSULATING MEANS BETWEEN THE CHAMBERS FOR IMPEDING HEAT TRANSFER BY RADIATION INWARDLY TOWARD THE INNER CHAMBER.
Claim 2
Dependent Claim
128 words
ENVIRONMENTAL APPARATUS COMPRISING: AN OUTER CHAMBER CONSTRUCTED OF CARBON STEEL; AN INNER CHAMBER LOCATED ENTIRELY WITHIN SAID OUTER CHAMBER AND CONSTRUCTED OF A METALLIC MATERIAL RELATIVELY DUCTILE AT THE TEMPERATURE OF LIQUID NITROGEN; SAID INNER CHAMBER HAVING INNER AND OUTER WALLS WITH MUTUALLY OPPOSED SURFACES SPACED APART ALONG THE ENTIRE MEANS OF SAID SURFACES TO DEFINE CHANNEL MEANS THEREBETWEEN; SAID CHAMBERS INCLUDING MEANS DEFINING A SPACE THEREBETWEEN; MEANS FOR EVACUATING THE SPACE BETWEEN SAID CHAMBERS TO A PRESSURE LEVEL WHERE HEAT TRANSFER BY CONVECTION IS NOT SIGNIFICANT; MEANS FOR EVACUATING THE INTERIOR OF THE INNER CHAMBER TO A PRESSURE LEVEL SUBSTANTIALLY LOWER THAN THAT IN THE SPACE BETWEEN THE TWO CHAMBERS; AN INSULATING MEANS BETWEEN THE CHAMBERS FOR IMPEDING HEAT TRANSFER BY RADIATION INWARDLY TOWARD THE INNER CHAMBER.
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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |