Patent US2672108A successfully refreshed from Google Patents.
US2672108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace
Assignee: Individual
•
Filing: 1948-10-01
•
Granted: 1954-03-16
•
Expires: 1968-10-01
Abstract
No abstract record available.
Inventors
- 👤 Gerald D Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:08
CPC Classifications
F; F26; F26B; F26B11/00; F26B11/02; F26B11/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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DE397548C
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US901232A
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US1734669A
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FR637112A
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US1795347A
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US1852968A
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US2121537A
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US2150534A
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US2196864A
Cited
US2357301A
Cited
US2395103A
Cited
US2448595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |