US3128001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral end course for multilayer pressure vessels
Assignee: Chicago Bridge and Iron Co
•
Filing: 1961-12-22
•
Granted: 1964-04-07
•
Expires: 1981-12-22
Abstract
No abstract record available.
Inventors
- 👤 Ewald F Schmitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:47
CPC Classifications
F; F16; F16J; F16J13/00; F16J13/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
145 words
IN A "MULTILAYER" PRESSURE VESSEL, A CYLINDRICAL WALL SECTION COMPOSED OF A SERIES OF SUPERIMPOSED CONCENTRIC CYLINDRICAL LAYERS, SAID WALL SECTION HAVING AN ANNULAR END SURFACE DEFINED BY THE ENDS OF SAID CONCENTRIC LAYERS, A WELD DEPOSIT DISPOSED CONTINUOUSLY OVER THE ANNULAR END SURFACE AND CONNECTING THE ENDS OF THE INDIVIDUAL LAYERS TOGETHER, SAID END SURFACE AND SAID WELD DEPOSIT HAVING A PLURALITY OF BOLT-RECEIVING PASSAGES THEREIN DISPOSED AXIALLY PARALLEL TO THE LONGITUDINAL AXIS OF SAID VESSEL, SAID BOLT-RECEIVING PASSAGES BEING INTERNALLY THREADED AND HAVING A PRESSURE FLANK ANGLE LESS THAN 7 DEGREES, AN END CLOSURE DISPOSED DIRECTLY AGAINST SAID WELD DEPOSIT AND HAVING A SERIES OF OPENINGS LOCATED IN ALIGNMENT WITH SAID PASSAGES, AND A PLURALITY OF BOLTS DISPOSED WITHIN SAID OPENINGS AND THREADED INTO SAID PASSAGES, SAID BOLTS BEING EXTERNALLY THREADED AND HAVING A PRESSURE FLANK ANGLE TO COMPLEMENT THAT OF SAID PASSAGES.
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) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |