Patent US2170377A successfully refreshed from Google Patents.
US2170377A
Expired / Lapsed
US
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Picture illumination
Assignee: Individual
•
Filing: 1936-12-18
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Granted: 1939-08-22
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Expires: 1956-12-18
Abstract
No abstract record available.
Inventors
- 👤 Louise A Nisle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:59
CPC Classifications
F; F21; F21V; F21V33/00; F21V33/0004; F21V33/0024; F21V33/0028; F21V33/0032
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-08-21 | 1943-02-20 | 1943-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-21 | 1947-02-20 | 1947-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-21 | 1951-02-20 | 1951-08-22 | $7700.00 | Window Closed / Lapsed |