US3388747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fusible apparatus for protecting automatic sprinklers
Assignee: Grinnell Corp
•
Filing: 1966-04-08
•
Granted: 1968-06-18
•
Expires: 1986-04-08
Abstract
No abstract record available.
Inventors
- 👤 Robert M Hodnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:14
CPC Classifications
A; A62; A62C; A62C37/00; A62C37/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1432386A
Cited
US1230469A
Cited
US2531790A
Cited
US2890758A
Cited
US3130790A
Cited
US3178879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |