US2583939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-diffusing shield for elongated tubular lamps
Assignee: PLASTI CATION CORP
•
Filing: 1948-08-28
•
Granted: 1952-01-29
•
Expires: 1968-08-28
Abstract
No abstract record available.
Inventors
- 👤 George O French
- 👤 Roy Jacques H Du
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:24
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/04; F21V7/00; F21V7/0008; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1997687A
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US2323002A
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US2366216A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |