US1909947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operating room lighting fixture
Assignee: Individual
•
Filing: 1929-02-06
•
Granted: 1933-05-23
•
Expires: 1949-02-06
Abstract
No abstract record available.
Inventors
- 👤 Ernest H Greppin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:48
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/02; F21S; F21S8/00; F21S8/04; F21S8/06; F21S8/063; F21W; F21W2131/00; F21W2131/20; F21W2131/205
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) | 1936-05-22 | 1936-11-21 | 1937-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-05-22 | 1940-11-21 | 1941-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-05-22 | 1944-11-21 | 1945-05-23 | $7700.00 | Window Closed / Lapsed |