Patent US2067670A successfully refreshed from Google Patents.
US2067670A
Expired / Lapsed
US
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Fluid heater
Assignee: Babcock and Wilcox Co
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Filing: 1932-02-20
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Granted: 1937-01-12
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Expires: 1952-02-20
Abstract
No abstract record available.
Inventors
- 👤 Howard J Kerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:26
CPC Classifications
F; F22; F22D; F22D1/00; F22D1/36; F22B; F22B17/00; F22B17/16; F22D1/02; F22D1/04; F22D1/06
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) | 1940-01-12 | 1940-07-13 | 1941-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-01-12 | 1944-07-13 | 1945-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-01-12 | 1948-07-13 | 1949-01-12 | $7700.00 | Window Closed / Lapsed |