US2779855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic electrically operated water heater
Assignee: Individual
•
Filing: 1955-06-14
•
Granted: 1957-01-29
•
Expires: 1975-06-14
Abstract
No abstract record available.
Inventors
- 👤 Boyd F Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:28
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; F; F24; F24H; F24H1/00; F24H1/22; F24H1/225; F24H9/00; F24H9/12; F24H9/13; F24H9/133
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) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |