US777677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic gas danger-signal.
Assignee: Individual
•
Filing: 1904-02-16
•
Granted: 1904-12-20
•
Expires: 1924-02-16
Abstract
No abstract record available.
Inventors
- 👤 Preston A Kettering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:13
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/08; G01L19/12; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; 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) | 1907-12-20 | 1908-06-20 | 1908-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-12-20 | 1912-06-20 | 1912-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-12-20 | 1916-06-20 | 1916-12-20 | $7700.00 | Window Closed / Lapsed |