US937777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heating water.
Assignee: Individual
•
Filing: 1909-01-28
•
Granted: 1909-10-26
•
Expires: 1929-01-28
Abstract
No abstract record available.
Inventors
- 👤 Austin C Dunham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:00
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/18; F24H1/20; F24H1/201; F24H1/202
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) | 1912-10-25 | 1913-04-26 | 1913-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-10-25 | 1917-04-26 | 1917-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-10-25 | 1921-04-26 | 1921-10-26 | $7700.00 | Window Closed / Lapsed |