Patent US3064638A successfully refreshed from Google Patents.
US3064638A
Expired / Lapsed
US
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Furnace
Assignee: Empire Comfort Systems Inc
•
Filing: 1959-10-30
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Granted: 1962-11-20
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Expires: 1979-10-30
Abstract
No abstract record available.
Inventors
- 👤 Adrian F Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:45
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/10; F24H3/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US716450A
Cited
US757348A
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US1798290A
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US1971841A
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US2162410A
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US2457818A
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US2511490A
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US2755794A
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US2764972A
Cited
US2856837A
Cited
US2871847A
Cited
US2964034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |