Patent US2618246A successfully refreshed from Google Patents.
US2618246A
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US
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Stand boiler with vertical flue and water circulating coil therein
Assignee: Individual
•
Filing: 1949-03-15
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Granted: 1952-11-18
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Expires: 1969-03-15
Abstract
No abstract record available.
Inventors
- 👤 Rostek Vincent Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:00
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/18; F24H1/20; F24H1/205; F24H1/207
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US735473A
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GB148611A
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US1512480A
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US1634084A
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US1933726A
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US2162620A
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US2356657A
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US2403173A
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US2549755A
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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) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |