Patent US5954581A successfully refreshed from Google Patents.
US3229683A
Expired / Lapsed
US
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Water heating apparatus
Assignee: ACE TANK AND HEATER CO
•
Filing: 1961-06-26
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Granted: 1966-01-18
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Expires: 1981-06-26
Abstract
No abstract record available.
Inventors
- 👤 James A Russell
- 👤 Bernard E Mcclanahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:45
CPC Classifications
F; F24; F24D; F24D17/00; F24H; F24H1/00; F24H1/18; F24H1/186; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86348; Y10T137/86372
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |