US1680142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retarding chamber for automatic sprinkler systems
Assignee: Reliable Automatic Sprinkler Co Inc
•
Filing: 1922-08-30
•
Granted: 1928-08-07
•
Expires: 1942-08-30
Abstract
No abstract record available.
Inventors
- 👤 Evans John Edward
- 👤 Griffiths Francis Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:46
CPC Classifications
A; A62; A62C; A62C35/00; A62C35/58; A62C35/60; A62C35/605
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1931-08-07 | 1932-02-06 | 1932-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-08-07 | 1936-02-06 | 1936-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-08-07 | 1940-02-06 | 1940-08-07 | $7700.00 | Window Closed / Lapsed |