Patent US2587530A successfully refreshed from Google Patents.
US2587530A
Expired / Lapsed
US
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Water and fire tube for steam boilers
Assignee: Individual
•
Filing: 1949-03-14
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Granted: 1952-02-26
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Expires: 1969-03-14
Abstract
No abstract record available.
Inventors
- 👤 Rossi Giovanni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:19
CPC Classifications
F; F22; F22B; F22B25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US423664A
Cited
US780535A
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AT26987B
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FR399468A
Cited
US1077160A
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US1211858A
Cited
US1349571A
Cited
US1775638A
Cited
US1859745A
Cited
US2468903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |