Patent US2617918A successfully refreshed from Google Patents.
US2617918A
Expired / Lapsed
US
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Fluorescent lamp shade structure
Assignee: Individual
•
Filing: 1948-10-18
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Granted: 1952-11-11
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Expires: 1968-10-18
Abstract
No abstract record available.
Inventors
- 👤 William A Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:36
CPC Classifications
F; F21; F21S; F21S6/00; F21S6/004; F21S6/005; F21V; F21V11/00; F21V11/02; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB308625A
Cited
US1738009A
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US1978251A
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US2305214A
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US2223873A
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US2293924A
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US2344160A
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US2387055A
Cited
US2363374A
Cited
US2452507A
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US2511440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |