US636091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-heating apparatus.
Assignee: PERCY S REGNART
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Filing: 1899-05-11
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Granted: 1899-10-31
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Expires: 1919-05-11
Abstract
No abstract record available.
Inventors
- 👤 Edwin R Waterman
- 👤 Robert R Morison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:03
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H9/2007; F24H9/2014; F24H9/2021; F24H15/00; F24H15/10; F24H15/174; F24H15/20; F24H15/212; F24H15/223; F24H15/30; F24H15/355; F24H15/37
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) | 1902-10-31 | 1903-05-02 | 1903-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1906-10-31 | 1907-05-02 | 1907-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1910-10-31 | 1911-05-02 | 1911-11-01 | $7700.00 | Window Closed / Lapsed |