US2811955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor generating installation with multiple platen radiant superheater
Assignee: Babcock and Wilcox Co
•
Filing: 1950-12-06
•
Granted: 1957-11-05
•
Expires: 1970-12-06
Abstract
No abstract record available.
Inventors
- 👤 Paul H Koch
- 👤 Arthur E Raynor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:03
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/14; F22B37/143; F22G; F22G1/00; F22G1/06
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |