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Patent US991970A successfully refreshed from Google Patents.
US991970A
Expired / Lapsed
US
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Water-heater.
Assignee: HARRISON SAFETY BOILER WORKS
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Filing: 1910-10-12
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Granted: 1911-05-09
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Expires: 1930-10-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Gamble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:34
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/18; B01D3/20; Y; Y10; Y10S; Y10S261/00; Y10S261/10
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) | 1914-05-08 | 1914-11-07 | 1915-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1918-05-08 | 1918-11-07 | 1919-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1922-05-08 | 1922-11-07 | 1923-05-09 | $7700.00 | Window Closed / Lapsed |