Patent US3102530A successfully refreshed from Google Patents.
US3102530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger assemblies for forced air furnaces
Assignee: Motors Liquidation Co
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Filing: 1961-05-11
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Granted: 1963-09-03
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Expires: 1981-05-11
Abstract
No abstract record available.
Inventors
- 👤 Gordon H Diehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:32
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)
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US2160269A
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US2220604A
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US2453912A
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US2495673A
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US2762612A
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US2792826A
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US2864359A
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US2808047A
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US2916032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |