Patent US808929A successfully refreshed from Google Patents.
US808929A
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US
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Automatic gas danger-signal.
Assignee: Individual
•
Filing: 1904-05-31
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Granted: 1906-01-02
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Expires: 1924-05-31
Abstract
No abstract record available.
Inventors
- 👤 Preston A Kettering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:52
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/40; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/8158; Y10T137/8326
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) | 1909-01-01 | 1909-07-03 | 1910-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-01-01 | 1913-07-03 | 1914-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-01-01 | 1917-07-03 | 1918-01-02 | $7700.00 | Window Closed / Lapsed |