Patent US2455201A successfully refreshed from Google Patents.
US2455201A
Expired / Lapsed
US
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Furnace baffle
Assignee: Petro-Chem Process Co Inc
•
Filing: 1944-01-03
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Granted: 1948-11-30
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Expires: 1964-01-03
Abstract
No abstract record available.
Inventors
- 👤 John S Wallis
- 👤 John W Throckmorton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:07
CPC Classifications
F; F23; F23M; F23M9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US41152A
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US304869A
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US2104127A
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US978467A
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US1383852A
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US1871937A
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US1885674A
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US2195617A
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US2177573A
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US2286688A
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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) | 1951-11-30 | 1952-05-31 | 1952-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-30 | 1956-05-31 | 1956-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-30 | 1960-05-31 | 1960-11-30 | $7700.00 | Window Closed / Lapsed |