US2581078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for aircraft
Assignee: Heraeus Noblelight Analytics Ltd
•
Filing: 1944-12-11
•
Granted: 1952-01-01
•
Expires: 1964-12-11
Abstract
No abstract record available.
Inventors
- 👤 Corfield Albert Henry
- 👤 Chapman Edward Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:22
CPC Classifications
A; A62; A62C; A62C3/00; A62C3/07; A62C3/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB189611617A
Cited
US1171850A
Cited
US1200339A
Cited
US1223866A
Cited
US1576950A
Cited
GB224705A
Cited
GB247961A
Cited
US1835916A
Cited
US1800259A
Cited
US2137395A
Cited
US2145543A
Cited
US2208697A
Cited
US2251568A
Cited
US2189147A
Cited
US2284103A
Cited
US2352692A
Cited
US2333210A
Cited
US2414912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |