US2037575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alarm device for sprinkler systems
Assignee: Individual
•
Filing: 1932-09-16
•
Granted: 1936-04-14
•
Expires: 1952-09-16
Abstract
No abstract record available.
Inventors
- 👤 William R Hamilton
- 👤 Robert W Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:47
CPC Classifications
G; G01; G01P; G01P13/00; G01P13/0006; G01P13/0026; G01P13/0033; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/28; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/2602; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7786; Y10T137/8158
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) | 1939-04-14 | 1939-10-14 | 1940-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-04-14 | 1943-10-14 | 1944-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-04-14 | 1947-10-14 | 1948-04-14 | $7700.00 | Window Closed / Lapsed |