US2030818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a pressure vessel
Assignee: Babcock and Wilcox Co
•
Filing: 1932-03-07
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Granted: 1936-02-11
•
Expires: 1952-03-07
Abstract
No abstract record available.
Inventors
- 👤 Harter Isaac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:49
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/24; B21D41/00; B21D41/04; B21D41/045; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1939-02-10 | 1939-08-12 | 1940-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-02-10 | 1943-08-12 | 1944-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-02-10 | 1947-08-12 | 1948-02-11 | $7700.00 | Window Closed / Lapsed |