Patent CH356898A successfully refreshed from Google Patents.
Patent US2206336A successfully refreshed from Google Patents.
US2206336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam boiler
Assignee: Babcock and Wilcox Co
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Filing: 1937-11-26
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Granted: 1940-07-02
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Expires: 1957-11-26
Abstract
No abstract record available.
Inventors
- 👤 Will H Rowand
- 👤 Charles U Savoye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:05
CPC Classifications
F; F22; F22B; F22B21/00; F22B21/34; F22B21/346; F22B37/00; F22B37/02; F22B37/22
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) | 1943-07-02 | 1944-01-01 | 1944-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-07-02 | 1948-01-01 | 1948-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-07-02 | 1952-01-01 | 1952-07-02 | $7700.00 | Window Closed / Lapsed |