Patent US2969451A successfully refreshed from Google Patents.
US2969451A
Expired / Lapsed
US
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Hot water heaters
Assignee: Park Ohio Holdings Corp
•
Filing: 1958-05-29
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Granted: 1961-01-24
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Expires: 1978-05-29
Abstract
No abstract record available.
Inventors
- 👤 John A Logan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:48
CPC Classifications
F; F24; F24D; F24D17/00; F24D17/0089; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6497
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US984552A
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US1029870A
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US1396121A
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US1151586A
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US1555338A
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US1839007A
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US2729158A
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US2924697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |