US2419273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water heater
Assignee: Individual
•
Filing: 1944-10-18
•
Granted: 1947-04-22
•
Expires: 1964-10-18
Abstract
No abstract record available.
Inventors
- 👤 Ernest D Marquette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:41
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/02; F02N19/04; F02N19/10; F24; F24H; F24H1/00; F24H1/10; F24H1/101; F24H1/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1155098A
Cited
US1341144A
Cited
US1493773A
Cited
US1562240A
Cited
US1727959A
Cited
US1848188A
Cited
US2367197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-21 | 1950-10-21 | 1951-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-21 | 1954-10-21 | 1955-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-21 | 1958-10-21 | 1959-04-22 | $7700.00 | Window Closed / Lapsed |