US2134491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Art of illumination
Assignee: S H KRESS AND Co
•
Filing: 1936-02-06
•
Granted: 1938-10-25
•
Expires: 1956-02-06
Abstract
No abstract record available.
Inventors
- 👤 Edward F Sibbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:50
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/006; F; F21; F21S; F21S8/00; F21S8/02; F21V; F21V11/00
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) | 1941-10-24 | 1942-04-25 | 1942-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-10-24 | 1946-04-25 | 1946-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-10-24 | 1950-04-25 | 1950-10-25 | $7700.00 | Window Closed / Lapsed |