Patent US2840690A successfully refreshed from Google Patents.
US2840690A
Expired / Lapsed
US
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Lamp holder assembly for luminaire
Assignee: McGraw Edison Co
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Filing: 1953-09-28
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Granted: 1958-06-24
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Expires: 1973-09-28
Abstract
No abstract record available.
Inventors
- 👤 Donald W Harling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:43
CPC Classifications
F; F21; F21V; F21V17/00; F21S; F21S8/00; F21S8/08; F21S8/085; F21S8/086; F21V23/00; F21V23/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US471730A
Cited
US668887A
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US1366914A
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US1976657A
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CH183320A
Cited
US2289160A
Cited
US2584671A
Cited
FR1047134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |