Pressure vessel
Abstract
Abstract A PRESSURE VESSEL SUITABLE FOR LARGE SCALE CHEMICAL PROCESSING COMPRISES AN INNER SHELL INSUFFICIENTLY STRONG TO WITHSTAND THE CIRCUMFERENTIAL STRESSES AT THE INTENDED WORKING PRESSURE OF THE VESSEL, IN COMBINATION WITH SEPARATE EXTERNAL MEMBERS SUPPORTING THE INNER SHELL AGAINST CIRCUMFERENTIAL STRESS AND POSSIBLE ALSO MERIDIONAL STRESS IF THE VOLUME AND WORKING PRESSURE ARE GREAT ENOUGH TO DEMAND IT. THE CIRCUMFERENTIAL STRESS MEMBER MAY BE OUTSIDE OR INSIDE THE MERIDIONAL STRESS MEMBERS. FOR PROCESSING CORROSIVE MATERIALS A DOUBLE INNER SHELL OF CORROSION-RESISTANT METAL OR ALLOY MAY BE USED, THE CAVITY BETWEEN THE TWO SHELLS BEING VENTED SO AS TO DIMINISH OR AVOID CONTACT OF THE CORROSIVE MATERIAL WITH THE STRESS-BEARING MEMBERS OF THE VESSEL.
Inventors
- 👤 John Mcfarland
Bibliographic Details
Claims Analysis
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |