Patent US3503384A successfully refreshed from Google Patents.
US3503384A
Expired / Lapsed
US
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Hot water heater with air expelling and cold water mixing arrangement
Assignee: Kidde Inc
•
Filing: 1968-07-22
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Granted: 1970-03-31
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Expires: 1988-07-22
Abstract
No abstract record available.
Inventors
- 👤 Henry A Matarazzo
- 👤 Frank R Giannella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:55
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/12; F24H9/13; F24H9/133; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6497; Y10T137/8593; Y10T137/86348; Y10T137/86372
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2294163A
Cited
US2600521A
Cited
US2621901A
Cited
US2592863A
Cited
US2971532A
Cited
US3447560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-30 | 1973-09-29 | 1974-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-30 | 1977-09-29 | 1978-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-30 | 1981-09-29 | 1982-03-31 | $7700.00 | Window Closed / Lapsed |