US2032447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water heating and storage system with dual thermostatic control
Assignee: Individual
•
Filing: 1933-05-12
•
Granted: 1936-03-03
•
Expires: 1953-05-12
Abstract
No abstract record available.
Inventors
- 👤 Elmer S Stack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:18
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/18; F24H1/186; F24H15/00; F24H15/10; F24H15/128; F24H15/174; F24H15/20; F24H15/212; F24H15/215; F24H15/219; F24H15/30; F24H15/305; F24H15/31; F24H15/355; F24H15/36; F24H15/365; F24H9/00; F24H9/20; F24H9/2007; F24H9/2035
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) | 1939-03-03 | 1939-09-02 | 1940-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-03-03 | 1943-09-02 | 1944-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-03-03 | 1947-09-02 | 1948-03-03 | $7700.00 | Window Closed / Lapsed |