US2551752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire preventing or extinguishing apparatus for aircraft
Assignee: Graviner Manufacturing Co Ltd
•
Filing: 1947-06-11
•
Granted: 1951-05-08
•
Expires: 1967-06-11
Abstract
No abstract record available.
Inventors
- 👤 Mathisen Anders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:09
CPC Classifications
A; A62; A62C; A62C3/00; A62C3/07; A62C3/08; Y; Y10; Y10S; Y10S200/00; Y10S200/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB385897A
Cited
US2010897A
Cited
US2013924A
Cited
US2176770A
Cited
US2242679A
Cited
US2189147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |