US2533615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water heater
Assignee: McGraw Electric Co
•
Filing: 1947-01-04
•
Granted: 1950-12-12
•
Expires: 1967-01-04
Abstract
No abstract record available.
Inventors
- 👤 Clark M Osterheld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:58
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/02; H05B3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1359400A
Cited
US1692270A
Cited
US1996625A
Cited
GB488299A
Cited
US2289981A
Cited
US2364996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |