Patent US731339A successfully refreshed from Google Patents.
US731339A
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US
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Apparatus for heating fluids or fluid mixtures.
Assignee: Individual
•
Filing: 1901-03-28
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Granted: 1903-06-16
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Expires: 1921-03-28
Abstract
No abstract record available.
Inventors
- 👤 Frank S Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:30
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/101; F24H1/106
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) | 1906-06-15 | 1906-12-15 | 1907-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1910-06-15 | 1910-12-15 | 1911-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1914-06-15 | 1914-12-15 | 1915-06-16 | $7700.00 | Window Closed / Lapsed |