US2519920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric resistance water heater
Assignee: Individual
•
Filing: 1947-07-10
•
Granted: 1950-08-22
•
Expires: 1967-07-10
Abstract
No abstract record available.
Inventors
- 👤 Donald B Miner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:00
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/18; F24H1/185; F24H1/10; F24H1/12; F24H1/14; F24H1/142; Y; Y10; Y10S; Y10S159/00; Y10S159/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US729222A
Cited
US1389166A
Cited
US1715687A
Cited
US1844268A
Cited
US2042742A
Cited
US2268233A
Cited
US2397568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |