US2655205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerative heating apparatus
Assignee: Individual
•
Filing: 1950-01-17
•
Granted: 1953-10-13
•
Expires: 1970-01-17
Abstract
No abstract record available.
Inventors
- 👤 Linderoth Erik Torvald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:54
CPC Classifications
F; F23; F23C; F23C99/00; F24; F24H; F24H1/00; F24H1/18; F24H1/20; F24H1/205; F24H1/22; F24H1/40; F24H1/43; F23C2700/00; F23C2700/02; F23C2700/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1102345A
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US1217698A
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US1474867A
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US1811654A
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US1993748A
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US1923614A
Cited
US2525782A
Cited
US2574460A
Cited
US2563028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |