US2754993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vessel head reinforcing ring and method of pre-stressing
Assignee: Individual
•
Filing: 1953-10-23
•
Granted: 1956-07-17
•
Expires: 1973-10-23
Abstract
No abstract record available.
Inventors
- 👤 Frank L Maker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:10
CPC Classifications
B; B01; B01J; B01J3/00; B01J3/002; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805; Y10T29/49826; Y10T29/49863
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
IN COMBINATION WITH A SHEET METAL VESSEL SUBJECT TO PRESSURE CHANGES AND HAVING A CONCAVE HEAD WELDED TO A CYLINDRICAL SHELL AND CIRCUMFERENTIAL STIFFENING MEANS SECURED IN SAID SHELL FACING THE CONCAVE SIDE OF SAID HEAD AND SPACED FROM SAID WELD, MEANS FOR REDUCING STRESS IN SAID HEAD ADJACENT TO SAID WELD DUE TO PRESSURE CHANGES IN SAID VESSEL, COMPRISING A RING SELECTIVELY CONNECTED TO SAID STIFFENING MEANS, AND MEANS FOR INTRODUCING COMPRESSIVE STRESSES IN SAID RING.
References Cited (Backward Citations)
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Cited
US332901A
Cited
US726520A
Cited
US1186572A
Cited
US1736610A
Cited
US1748138A
Cited
US1748576A
Cited
US2101996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |