US2620780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste heat vapor generator
Assignee: Babcock and Wilcox Co
•
Filing: 1949-08-10
•
Granted: 1952-12-09
•
Expires: 1969-08-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles L Marquez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:36
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/20; F22B1/00; F22B1/02; F22B1/18; F22B1/1869; F22B1/1876
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2139348A
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US2310801A
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US2271639A
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US2284601A
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US2498761A
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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) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |