US2634804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for generating heat
Assignee: Individual
•
Filing: 1951-10-10
•
Granted: 1953-04-14
•
Expires: 1971-10-10
Abstract
No abstract record available.
Inventors
- 👤 Henry L Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:11
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1137328A
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US1052588A
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US1051363A
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US1811654A
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US2175866A
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US2165269A
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US2247977A
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US2235967A
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US2414828A
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US2553091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |