US2231872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant boiler
Assignee: Babcock and Wilcox Co
•
Filing: 1937-04-16
•
Granted: 1941-02-18
•
Expires: 1957-04-16
Abstract
No abstract record available.
Inventors
- 👤 Ervin G Bailey
- 👤 Thomas C Toomey
- 👤 Shellenberger Rolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:28
CPC Classifications
F; F22; F22B; F22B31/00; F22B21/00; F22B21/34; F22B21/341; F22B21/343; F22B21/345; F22B37/00; F22B37/02; F22B37/10; F22B37/20; F22B37/201; Y; Y10; Y10S; Y10S122/00; Y10S122/01
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) | 1944-02-18 | 1944-08-19 | 1945-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-18 | 1948-08-19 | 1949-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-18 | 1952-08-19 | 1953-02-18 | $7700.00 | Window Closed / Lapsed |