Patent US3354432A successfully refreshed from Google Patents.
US2449480A
Expired / Lapsed
US
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Lighting control system for airports
Assignee: Westinghouse Electric Corp
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Filing: 1944-07-20
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Granted: 1948-09-14
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Expires: 1964-07-20
Abstract
No abstract record available.
Inventors
- 👤 James P Houck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:15
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/18; B64F1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1638417A
Cited
US1673369A
Cited
GB299699A
Cited
US1776111A
Cited
US2052333A
Cited
US2325258A
Cited
US2407949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-14 | 1952-03-15 | 1952-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-14 | 1956-03-15 | 1956-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-14 | 1960-03-15 | 1960-09-14 | $7700.00 | Window Closed / Lapsed |