Patent US3857619A successfully refreshed from Google Patents.
Patent US1325254A successfully refreshed from Google Patents.
US1325254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection light unit
Assignee: —
•
Filing: —
•
Granted: 1919-12-16
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Expires: 1936-12-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:59
CPC Classifications
F; F21; F21V; F21V29/00; F21V29/50; F21V29/502; F21V29/503; H; H01; H01K; H01K1/00; H01K1/28; H01K1/30; F21V29/15; F21V29/506; F21V29/70; H01K1/58
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) | 1922-12-15 | 1923-06-16 | 1923-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1926-12-15 | 1927-06-16 | 1927-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1930-12-15 | 1931-06-16 | 1931-12-16 | $7700.00 | Window Closed / Lapsed |