Patent US2978562A successfully refreshed from Google Patents.
US2978562A
Expired / Lapsed
US
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Instantaneous water heating system
Assignee: Individual
•
Filing: 1958-05-19
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Granted: 1961-04-04
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Expires: 1978-05-19
Abstract
No abstract record available.
Inventors
- 👤 Hubert D Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:36
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/101; H; H05; H05B; H05B3/00; H05B3/0033; H05B3/0038; H05B3/0052; Y; Y10; Y10S; Y10S159/00; Y10S159/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |