US2738491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projected warning signal device for airplanes
Assignee: GLOWMETER Corp
•
Filing: 1951-11-14
•
Granted: 1956-03-13
•
Expires: 1971-11-14
Abstract
No abstract record available.
Inventors
- 👤 Agis I Mihalakis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:14
CPC Classifications
B; B64; B64C; B64C25/00; B64C25/02; B64C25/08; B64C25/10; B64C25/18; B64C25/26; B64C25/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1871877A
Cited
US2178637A
Cited
US2262756A
Cited
US2292392A
Cited
US2424573A
Cited
US2450450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |