Patent US3068854A successfully refreshed from Google Patents.
US3068854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space heater and heating system
Assignee: Individual
•
Filing: 1959-08-17
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Granted: 1962-12-18
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Expires: 1979-08-17
Abstract
No abstract record available.
Inventors
- 👤 Carl R Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:07
CPC Classifications
F; F24; F24D; F24D5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1389408A
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US1416255A
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US1936003A
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US2015960A
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US2056465A
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US2440052A
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US2593759A
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US2600020A
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US2804869A
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US2897814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |