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Patent US2920874A successfully refreshed from Google Patents.
US2920874A
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Steam generator construction
Assignee: Griscom Russell Co
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Filing: 1955-06-22
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Granted: 1960-01-12
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Expires: 1975-06-22
Abstract
No abstract record available.
Inventors
- 👤 Karl A Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:37
CPC Classifications
F; F22; F22D; F22D1/00; F22D1/02; F22B; F22B21/00; F22B21/22; F22B21/30; F22G; F22G7/00; F22G7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE481998C
Cited
US686313A
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FR672293A
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US1802413A
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US1879453A
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US2065708A
Cited
US2239685A
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US2337624A
Cited
US2457022A
Cited
US2743089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |