US819611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-projecting apparatus.
Assignee: JOSEPH L STIEBEL
•
Filing: 1904-12-30
•
Granted: 1906-05-01
•
Expires: 1924-12-30
Abstract
No abstract record available.
Inventors
- 👤 Edmond W Sohlberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:09
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1909-04-30 | 1909-10-30 | 1910-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-04-30 | 1913-10-30 | 1914-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-04-30 | 1917-10-30 | 1918-05-01 | $7700.00 | Window Closed / Lapsed |