Patent US2725620A successfully refreshed from Google Patents.
US2725620A
Expired / Lapsed
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Method of forming a pressure container
Assignee: Chicago Bridge and Iron Co
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Filing: 1950-02-02
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Granted: 1955-12-06
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Expires: 1970-02-02
Abstract
No abstract record available.
Inventors
- 👤 Raymund V Mcgrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:50
CPC Classifications
F; F17; F17C; F17C1/00; B; B21; B21D; B21D51/00; B21D51/16; B21D51/24; E; E04; E04H; E04H7/00; E04H7/02; E04H7/04; E04H7/06; F17C13/00; F17C13/04; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2201/0119; F17C2201/03; F17C2201/032; F17C2201/05; F17C2201/054; F17C2203/00; F17C2203/01; F17C2203/011; F17C2203/012; F17C2203/06; F17C2203/0602; F17C2203/0612; F17C2203/0614; F17C2203/0617; F17C2203/0634; F17C2203/0636; F17C2205/00; F17C2205/01; F17C2205/0153; F17C2205/0184; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0332; F17C2209/00; F17C2209/22; F17C2209/221; F17C2209/23; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/04; F17C2223/042; F17C2223/043; F17C2223/045; F17C2260/00; F17C2260/01; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805; Y10T29/49826; Y10T29/49863; Y10T29/49877
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD FOR CONSTRUCTING A CYLINDRICAL PRESSURE VESSEL WHICH COMPRISES, FORMING A FLAT CIRCULAR BOTTOM OF RELATIVELY THIN FLEXIBLE PLATES FOR THE VESSEL, ATTACHING THE SIDE WALLS AND TOP THERETO, APPLYING INTERNAL GAS PRESSURE TO THE VESSEL IN AMOUNT GENERALLY EQUAL TO THE INTENDED SERVICE PRESSURE TO RAISE THE OUTER PORTION OF THE BOTTOM BY BENDING OF THE BOTTOM PLATES WITHIN THEIR ELASTIC LIMIT, AND THEN FORMING A FOUNDATION UNDER THE RAISED BOTTOM
Claim 2
Independent Claim
73 words
THE METHOD FOR CONSTRUCTING A CYLINDRICAL PRESSURE VESSEL WHICH COMPRISES, FORMING A FLAT CIRCULAR BOTTOM OF RELATIVELY THIN FLEXIBLE PLATES FOR THE VESSEL, ATTACHING THE SIDE WALLS AND TOP THERETO, APPLYING INTERNAL GAS PRESSURE TO THE VESSEL IN AMOUNT GENERALLY EQUAL TO THE INTENDED SERVICE PRESSURE TO RAISE THE OUTER PORTION OF THE BOTTOM BY BENDING OF THE BOTTOM PLATES WITHIN THEIR ELASTIC LIMIT, AND THEN FORMING A FOUNDATION UNDER THE RAISED BOTTOM
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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) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |