Patent US1489071A successfully refreshed from Google Patents.
US3486002A
Expired / Lapsed
US
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Air circulating and heating device
Assignee: MELBOURNE J ENO
•
Filing: 1967-09-05
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Granted: 1969-12-23
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Expires: 1987-09-05
Abstract
No abstract record available.
Inventors
- 👤 Melbourne J Eno
- 👤 Wilbur E Eno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:28
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/002; H; H05; H05B; H05B3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1099999A
Cited
US1154412A
Cited
US2396474A
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US2879364A
Cited
US2915615A
Cited
US3045102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |