Patent US2403173A successfully refreshed from Google Patents.
US2403173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water heating unit
Assignee: Individual
•
Filing: 1944-12-29
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Granted: 1946-07-02
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Expires: 1964-12-29
Abstract
No abstract record available.
Inventors
- 👤 Doerner Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:29
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/12; F24H1/14; F24H1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-07-01 | 1949-12-31 | 1950-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-07-01 | 1953-12-31 | 1954-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-07-01 | 1957-12-31 | 1958-07-02 | $7700.00 | Window Closed / Lapsed |