Patent US2601631A successfully refreshed from Google Patents.
US2601631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace wall
Assignee: Individual
•
Filing: 1947-07-07
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Granted: 1952-06-24
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Expires: 1967-07-07
Abstract
No abstract record available.
Inventors
- 👤 George P Reintjes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:24
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1814555A
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US1794706A
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US1856036A
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US1858489A
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US2034677A
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GB352191A
Cited
US2132517A
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US2375841A
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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) | 1955-06-24 | 1955-12-24 | 1956-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-24 | 1959-12-24 | 1960-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-24 | 1963-12-24 | 1964-06-24 | $7700.00 | Window Closed / Lapsed |