US2008568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot water heating system with auxiliary domestic water heater
Assignee: EVELYN L SNAVELY
•
Filing: 1934-02-21
•
Granted: 1935-07-16
•
Expires: 1954-02-21
Abstract
No abstract record available.
Inventors
- 👤 Earl R Snavely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:49
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/10; F24D19/1006; F24D19/1066; F24D3/00; F24D3/08; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6579; Y10T137/7722; Y10T137/7737; Y10T137/8593; Y10T137/86493
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) | 1938-07-15 | 1939-01-14 | 1939-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-07-15 | 1943-01-14 | 1943-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-07-15 | 1947-01-14 | 1947-07-16 | $7700.00 | Window Closed / Lapsed |