Patent US2557448A successfully refreshed from Google Patents.
US2557448A
Expired / Lapsed
US
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Explosive device for use in fire fighting equipment systems and the like
Assignee: Graviner Manufacturing Co Ltd
•
Filing: 1944-05-13
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Granted: 1951-06-19
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Expires: 1964-05-13
Abstract
No abstract record available.
Inventors
- 👤 Mathisen Anders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:36
CPC Classifications
A; A62; A62C; A62C99/00; A62C99/009; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1647; Y10T137/1797; Y10T137/1819; Y10T137/1827
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |