Patent US3454097A successfully refreshed from Google Patents.
US3454097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire protection systems and sprinkler head
Assignee: Viking Corp
•
Filing: 1967-08-08
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Granted: 1969-07-08
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Expires: 1987-08-08
Abstract
No abstract record available.
Inventors
- 👤 Richard T Groos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:13
CPC Classifications
A; A62; A62C; A62C37/00; A62C37/08; A62C37/10; A62C37/11; A62C37/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2558450A
Cited
US3195647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |