Patent US4526140A successfully refreshed from Google Patents.
Patent US2763245A successfully refreshed from Google Patents.
US2763245A
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Drum internal for low head boiler
Assignee: Combustion Engineering Inc
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Filing: 1952-03-22
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Granted: 1956-09-18
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Expires: 1972-03-22
Abstract
No abstract record available.
Inventors
- 👤 Palmer B Place
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:48
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/26; F22B37/32; F22B37/322; Y; Y10; Y10S; Y10S55/00; Y10S55/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1931544A
Cited
GB303303A
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US1875015A
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US2058239A
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US2160619A
Cited
US2232265A
Cited
US2297704A
Cited
US2368632A
Cited
US2346672A
Cited
US2594490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |