US2794967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airport approach lighting
Assignee: GTE Sylvania Inc
•
Filing: 1948-03-31
•
Granted: 1957-06-04
•
Expires: 1968-03-31
Abstract
No abstract record available.
Inventors
- 👤 Donald I Coggins
- 👤 Heins Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:06
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/18; B64F1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2457968A
Cited
US2155295A
Cited
US2350594A
Cited
US2449063A
Cited
US2402109A
Cited
US2582742A
Cited
US2602850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |